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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AdditionalIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional shares of common stock</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AdditionalIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of additional issuance of common stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_DescriptionofOrganizationBusinessOperationsandGoingConcernDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of Organization, Business Operations and Going Concern (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_HBCHoldbackSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">HBC Holdback Shares [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_HBCHoldbackSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">HBCHoldback Shares Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_MergerAgreementDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Merger agreement, description</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_MergerAgreementDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Merger Agreement Description</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_MergerAgreementDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of merger agreement description.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_MergerAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Merger Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_MergerAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Merger Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NetOfPlacementAgentFeesAndOfferingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net of placement agent fees and offering expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NetOfPlacementAgentFeesAndOfferingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net of Placement Agent Fees and Offering Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NetOfPlacementAgentFeesAndOfferingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of net of placement agent fees and offering expenses.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfHoldBackShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of holdback shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfHoldBackShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of HoldBack Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfHoldBackShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of holdback shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-Funded Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PurchaseOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PurchaseOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase of Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PurchaseOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of shares of purchase.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Axis]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common Stock [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash used in operating activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Cash Used In Operating Activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Net loss</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net income (loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Description of Organization, Business Operations and Going Concern [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Private Placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate consideration shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Private warrants were issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShorttermDebtMaximumAmountOutstandingDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principle amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShorttermDebtMaximumAmountOutstandingDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt, Maximum Amount Outstanding During Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Components [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Shares purchased of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pending issuance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Private placement of common stock</link:label>
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    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Other</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revision of Prior Period [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revision of Prior Period [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RevisionOfPriorPeriodErrorCorrectionAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revision of Prior Period, Error Correction, Adjustment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RevisionOfPriorPeriodErrorCorrectionAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revision of Prior Period, Error Correction, Adjustment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioPreviouslyReportedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Previously Reported [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioPreviouslyReportedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">As Previously Reported [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioPreviouslyReportedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Previously Reported [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CorrectionofErrorsinPreviouslyReportedConsolidatedFinancialStatementsDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Correction of Errors in Previously Reported Consolidated Financial Statements (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingChangesAndErrorCorrectionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Correction of Errors in Previously Reported Consolidated Financial Statements [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Offering Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherDeferredCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other costs incurred</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherDeferredCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Deferred Costs, Net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PreFundedWarrantsConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-funded warrants issued per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PreFundedWarrantsConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-Funded Warrants Consideration</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PreFundedWarrantsConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pre-Funded Warrants issued as per share.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived, Class [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PatentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Patents [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PatentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Patents [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chief operating decision maker</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of operating segment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Operating Segments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Transaction Cost, Excluding Separately Recognized Transaction</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityAccretionToRedemptionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Correction of prior-period error &#8211; warrant remeasurement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityAccretionToRedemptionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Accretion to Redemption Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CorrectionOfPriorperiodErrorFPASubscriptionReceivableDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Correction of prior-period error &#8211; FPA subscription receivable discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CorrectionOfPriorperiodErrorFPASubscriptionReceivableDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Correction Of Priorperiod Error FPASubscription Receivable Discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CorrectionOfPriorperiodErrorFPASubscriptionReceivableDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Correction of prior-period error &#8211; FPA subscription receivable discount.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Property And Equipment Estimated Useful Lives Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SummaryofSignificantAccountingPoliciesScheduleofPropertyandEquipmentEstimatedUsefulLivesDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies - Schedule of Property and Equipment Estimated Useful Lives (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IssuanceOfCommonStockForForwardPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Correction of prior-period error &#8211; Issuance of FPA shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IssuanceOfCommonStockForForwardPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Common Stock For Forward Purchase Agreement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IssuanceOfCommonStockForForwardPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of issuance of common stock for forward purchase agreement.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Stockholders&#8217; Equity (Deficit)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ParentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Parent [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ParentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Parent [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Accumulated Deficit [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Deficit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentRestatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Error Correction [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Schedule of Impact on Stockholders&#8217; Equity [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Correction of Errors in Previously Reported Consolidated Financial Statements [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Revised the Previously Issued Interim Balance Sheets [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RestatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">As Restated [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RestatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restated Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Additional Paid-in Capital [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid-in Capital [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LandImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Land improvements [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LandImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Land Improvements [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PublicUtilityPropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Property and Equipment Estimated Useful Lives [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NetUnissuedPatents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net unissued patents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NetUnissuedPatents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Unissued Patents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NetUnissuedPatents_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represent the amount of net unissued patents.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock initially reserved for issuance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Capital Shares Reserved for Future Issuance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfNumberOfStocksOfCommonStockOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of common stock outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfNumberOfStocksOfCommonStockOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Number Of Stocks Of Common Stock Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfNumberOfStocksOfCommonStockOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of number of stocks of common stock outstanding.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse stock split</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity, Reverse Stock Split</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SummaryofSignificantAccountingPoliciesDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TaxLienMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax Lien [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TaxLienMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax Lien Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TerminationAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TerminationAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Termination Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AnsonInvestmentsMasterFundLPAnsonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Anson Investments Master Fund LP ("Anson") [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AnsonInvestmentsMasterFundLPAnsonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Anson Investments Master Fund LPAnson Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IPOWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">IPO Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IPOWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IPOWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IPOWarrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesCWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series C Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesCWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series CWarrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesBWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series B Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesBWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series BWarrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Parties [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesAAndBWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A and B Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesAAndBWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants &#8211; Series A and B [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesAAndBWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series AAnd BWarrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsSeriesCAndDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series C and Series D Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsSeriesCAndDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Series CAnd DMember</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PlacementAgentWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Placement Agent Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued interest to related party.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Outstanding balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Interest Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of accrued interest.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance common shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Warrants outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TwoThousandTwentySixPrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026 Private Placement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TwoThousandTwentySixPrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2026 Private Placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TwoThousandTwentySixPrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Six Private Placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfSharesOwnedByHolder_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beneficially own percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfSharesOwnedByHolder_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Shares Owned By Holder</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfSharesOwnedByHolder_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of shares owned by holder.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfOutstandingCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of election upon issuance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfOutstandingCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Outstanding Common Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfOutstandingCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage Of Outstanding Common Stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfPurchasePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of purchase price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfPurchasePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Purchase Price Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfPurchasePricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of purchase price per share.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfDaysSubjectToLockUp_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of days subject to lock-up</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfDaysSubjectToLockUp_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Days Subject to Lock Up</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfDaysSubjectToLockUp_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of days subject to lock up.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investors [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investor [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders&#8217; Equity (Deficit) [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Parties [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Receivables, Net, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToSuppliersAndEmployees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses incurred related to employees</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToSuppliersAndEmployees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Suppliers and Employees</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GrantdateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Grant-date fair value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GrantdateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Grant-date Fair value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GrantdateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of grant-date fair value.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ExpireDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expire date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ExpireDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expire Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ExpireDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Expire date.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsSeriesDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants - Series D [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ArborLakeStrategicCooperationConsultingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Arbor Lake Strategic Cooperation Consulting Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_G3HoldbackSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">G3 Holdback Shares [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_G3HoldbackSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">G3 Holdback Shares Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Related Party [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PrivateWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PrivateWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Private Warrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesDWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series D Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesDWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series DWarrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesAWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Series A Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesAWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants &#8211; Series A [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesAWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series AWarrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Recapitalization [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Expected Term [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Expected term [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected life [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Expected Term [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected Dividend Yield [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Expected dividend rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Dividends [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Expected Dividend Rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AugustPrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">August Private Placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_HoldbackSharesNotBeIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Holdback shares not be issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_HoldbackSharesNotBeIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of holdback shares not be issued.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PromissoryNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Promissory Note [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PromissoryNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Promissory Note Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Name [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_DBoralCapitalLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">D. Boral Capital LLC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExercisePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise Price [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExercisePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Exercise Price [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total common stock equivalents included in dilutive income per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Included From Computation Of Earnings Per Share Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AntidilutiveSecuritiesIncludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of antidilutive securities included from computation of earnings per share.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockCompensationPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation - equity awards [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockCompensationPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfPurchasedCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfPurchasedCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Purchased Common Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfPurchasedCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares purchased common stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIssuedPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding principal amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIssuedPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Issued, Principal</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermDebtPercentageBearingFixedInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermDebtPercentageBearingFixedInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt, Percentage Bearing Fixed Interest Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockOtherSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares not issued (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockOtherSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stocks of common stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockOtherSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Other Shares, Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CommitmentsandContingenciesDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPrivateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants - Private [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPrivateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Private Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_HBCEarnoutSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">HBC Earnout Shares [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_HBCEarnoutSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">HBCEarnout Shares Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfPotentiallyDilutiveCommonStockEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Potentially Dilutive Common Stock Equivalents Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total intangible assets, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived, after Accumulated Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FiniteLivedIntangibleAssetsIssuedPatentsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Issued patents, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FiniteLivedIntangibleAssetsIssuedPatentsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Issued Patents Net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FiniteLivedIntangibleAssetsIssuedPatentsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of issued patents net.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross carrying amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived, before Accumulated Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Intangible Assets [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property and equipment, net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and Equipment, net of depreciation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCommitmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders&#8217; Equity (Deficit) [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&#8217; Equity (Deficit):</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transaction Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transaction costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToSuppliers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses related services</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToSuppliers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Suppliers</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ServicesOrEmployeeCostsOwed_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ServicesOrEmployeeCostsOwed_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Services Or Employee Costs Owed</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ServicesOrEmployeeCostsOwed_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">It represent services or employee costs outstanding.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LegalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal fees</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LegalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Fees</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashForWorkingCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash for working capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashForWorkingCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash For Working Capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashForWorkingCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of cash for working capital.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Due to related parties</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction, Amounts of Transaction</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfAssetsAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent consideration</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfAssetsAcquired_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value of Assets Acquired</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RecapitalizationDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Recapitalization (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt, Type [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_BeneschFriedlanderCoplanAronoffLLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Benesch Friedlander Coplan &amp; Aronoff LLP [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_BeneschFriedlanderCoplanAronoffLLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Benesch Friedlander Coplan Aronoff LLPMember</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Conversion of shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Converted share of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">New holders received shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion of Stock, Shares Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Promissory note principal</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Face Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Original principal amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Notes Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Volatility rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Fair Value, Net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Duration of years</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted net loss per share of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Diluted net income (loss) per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants exercised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Price Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NetProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NetProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Proceeds</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NetProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of net proceeds.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Common stock, shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsToPurchaseShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants to purchase shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsToPurchaseShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants to Purchase Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsToPurchaseShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants to purchase shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfGrossProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of gross proceeds</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfGrossProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Gross Proceeds</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfGrossProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of gross proceeds.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfTotalSecuritiesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of total securities sold</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfTotalSecuritiesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Total Securities Sold</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfTotalSecuritiesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of total securities sold.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash offering costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Offering Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of cash offering costs.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GrantDateFairValuePlacementAgentWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Grant-date fair value placement agent warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GrantDateFairValuePlacementAgentWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Grant-Date Fair Value Placement Agent Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GrantDateFairValuePlacementAgentWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of grant-date fair value placement agent warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Common Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of common stock.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RemainedOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remained outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RemainedOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Remained Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RemainedOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Th amount of remained outstanding.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAnnualPrincipalPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Principal amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAnnualPrincipalPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Annual Principal Payment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantSeriesAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants &#8211; Series A</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantSeriesAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant - Series A [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value by Liability Class [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unvested RSU</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares, Cancelled</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average recognition period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfCashBonus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash bonus percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfCashBonus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Cash Bonus</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PercentageOfCashBonus_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of cash bonus.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FairValueMeasurementsDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value measurement input</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Option pricing model assumptions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding, Measurement Input</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfRepurchaseAgreementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forward Purchase Agreement and Private Placement Financing [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Forward Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forward purchase agreement	[Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forward Purchase Agreement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepurchaseAgreementCounterpartyLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forward Purchase Agreement and Private Placement Financing [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepurchaseAgreementCounterpartyLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forward Purchase Agreement, Non Redemption Agreement and Private Placement Financing [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PurchaseOfInitialPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial price (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PurchaseOfInitialPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Of Initial Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PurchaseOfInitialPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of purchase of initial price.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsHeldInTrust_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trust account</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsHeldInTrust_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset, Held-in-Trust</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReimbursementConsiderationShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reimbursement consideration shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReimbursementConsiderationShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reimbursement Consideration Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReimbursementConsiderationShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of reimbursement consideration shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EquityMethodInvesteeNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FPAShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">FPA Shares [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FPAShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">FPAShare Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Determine the Fair Value [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value Measurement of the FPA [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public warrants expire term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding, Term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issued shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued to consultants (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Issued for Services</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementNonRedemptionAgreementAndPrivatePlacementFinancingDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forward Purchase Agreement, Non Redemption Agreement And Private Placement Financing (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_MonteCarloMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Monte Carlo [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_MonteCarloMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Monte Carlo Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instruments [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in interest rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Increase (Decrease)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock-Based Compensation [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfCompanySLiabilitiesThatAreMeasuredAtFairValueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Company SLiabilities That Are Measured At Fair Value Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Grant-Date Fair Value, Vested</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Grant-Date Fair Value, Cancelled</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Cancelled In Period Weighted Average Grant Date Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted Average Grant-Date Fair Value, End of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Weighted Average Grant-Date Fair Value, Beginning of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares, Vested</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic net income (loss) per share of common stock (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling, general and administrative</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling, General and Administrative Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating loss</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Income (Loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares outstanding (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Common stock, shares outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of derivative liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of derivative liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair value of warrants (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Adjustment of Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Nonoperating</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total other income (expense)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series C [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series D [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FairValueMeasurementRequired_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value measurement required</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FairValueMeasurementRequired_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value measurement Required</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FairValueMeasurementRequired_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of fair value measurement required.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesCAndDWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants &#8211; Series C and D [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SeriesCAndDWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series CAnd DWarrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesIssuedUponSettlementOfWarrantsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued upon settlement of warrants (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesIssuedUponSettlementOfWarrantsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares issued upon settlement of warrants shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesIssuedUponSettlementOfWarrantsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares issued upon settlement of warrants shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesIssuedUponSettlementOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued upon settlement of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesIssuedUponSettlementOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares issued upon settlement of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesIssuedUponSettlementOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of shares issued upon settlement of warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Assets:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Current Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Patents, net of amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Excluding Goodwill, after Accumulated Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Liabilities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term notes payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies (Note 6)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesAndExciseTaxPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Excise tax payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesAndExciseTaxPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales and Excise Tax Payable, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Due to related party</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, $0.0001 par value; 2,000,000 shares authorized; none issued and outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Value, Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares outstanding (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock, shares outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock shares authorized</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated deficit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings (Accumulated Deficit)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective tax rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Percent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockBasedCompensationDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock-Based Compensation (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative Liability [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShorttermDebtAverageOutstandingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term notes payable outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShorttermDebtAverageOutstandingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt, Average Outstanding Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class A Ordinary Shares [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class A [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash at end of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash at beginning of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other current assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable and Accrued Liabilities, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, $0.0001 par value, 300,000,000 shares authorized, 8,512,771 and 7,465,283 issued and outstanding as of June 30, 2026 and December 31, 2025, respectively</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares issued (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock, shares issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteSubscriptionsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Stock subscription receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteSubscriptionsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock subscription receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteSubscriptionsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity Note, Subscriptions Receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Par or Stated Value Per Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net sales</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gross profit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gross Profit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodSharesIssuedFromWarrantConversioninShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued from exercise of Series A Warrants (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodSharesIssuedFromWarrantConversioninShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Issued From Warrant Conversionin Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodSharesIssuedFromWarrantConversioninShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares issued from warrant conversion in shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueForwardPurchaseAgreementSubscriptionReceivableDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forward Purchase Agreement &#8211; subscription receivable discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueForwardPurchaseAgreementSubscriptionReceivableDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accretion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueForwardPurchaseAgreementSubscriptionReceivableDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Forward Purchase Agreement Subscription Receivable Discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueForwardPurchaseAgreementSubscriptionReceivableDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Value of shares of stock issued attributable to transactions classified forward purchase agreement &#8211; subscription receivable discount.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodSharesReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse stock split</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodSharesReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Reverse Stock Split</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodSharesReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period reverse stock splits value.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liability Class [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at ending</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UnrestrictedCommonStockAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrestricted Common Stock Awards [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_BearingInterestPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bearing interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_BearingInterestPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bearing Interest Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_BearingInterestPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of bearing interest.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecurityDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security deposit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecurityDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Deposit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidRent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid rent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidRent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Rent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total rent amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Rent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other rental expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UndiscountedFutureMinimumBaseRentPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Undiscounted future minimum base rent payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UndiscountedFutureMinimumBaseRentPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Undiscounted Future Minimum Base Rent Payments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UndiscountedFutureMinimumBaseRentPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of total undiscounted future minimum base rent payments.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PerRentableSquareFoot_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Per Rentable Square Foot</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PerRentableSquareFoot_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The per share amount of per rentable square foot.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of RSU Activity [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Weighted Average Grant-Date Fair Value, Outstanding, Beginning Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted Average Grant-Date Fair Value, Outstanding, Ending Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Grant-Date Fair Value, Granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Grant-Date Fair Value, Vested</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Grant-Date Fair Value, Cancelled</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfAwardsWithMarketBasedConditionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Awards With Market Based Conditions Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfRsuActivityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Rsu Activity Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Awards with Market-Based Conditions [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetAssetLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetAssetLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Net Asset (Liability)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RecycledSharesRelatedToTheFPA_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recycled shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RecycledSharesRelatedToTheFPA_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Recycled Shares Related To The FPA</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RecycledSharesRelatedToTheFPA_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of recycled shares related to FPA.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net change in cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for federal income taxes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Paid, after Refund Received</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Common Stock upon the closing of the Merger</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_DebtDiscountRecognizedOnNotePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt discount recognized on note payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_DebtDiscountRecognizedOnNotePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Discount Recognized On Note Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_DebtDiscountRecognizedOnNotePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of debt discount recognized on note payable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CapitalizedInterestToPrincipalBalanceOfShorttermNotePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capitalized interest to principal balance of short-term note payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CapitalizedInterestToPrincipalBalanceOfShorttermNotePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capitalized Interest To Principal Balance Of Shortterm Note Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CapitalizedInterestToPrincipalBalanceOfShorttermNotePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of capitalized interest to principal balance of short-term note payable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesIssuableUponSettlementOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued upon settlement of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesIssuableUponSettlementOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issuable Upon Settlement Of Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesIssuableUponSettlementOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares issuable upon settlement of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">DESCRIPTION OF ORGANIZATION, BUSINESS OPERATIONS AND GOING CONCERN</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RecapitalizationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RECAPITALIZATION</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RecapitalizationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Recapitalization Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RecapitalizationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of recapitalization.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">COMMITMENTS AND CONTINGENCIES</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">WARRANTS</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of entries warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued from exercise of Series A Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of convertible notes into common stock (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Conversion of Convertible Securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation to consultants (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, Depletion and Amortization, Nonproduction</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity compensation expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefits and Share-Based Compensation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares, Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of debt discount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Debt Issuance Costs and Discounts</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IncreaseDecreaseInExciseTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Excise taxes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IncreaseDecreaseInExciseTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Excise Taxes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IncreaseDecreaseInExciseTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The increase (decrease) during the period in the excise taxes.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReverseStockSplitPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse Stock Split</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReverseStockSplitPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reverse Stock Split Policy Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReverseStockSplitPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for reverse stock split.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementAndNonRedemptionAgreementPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forward Purchase Agreement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementAndNonRedemptionAgreementPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forward Purchase Agreement And Non Redemption Agreement Policy Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementAndNonRedemptionAgreementPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of accounting policy forward purchase agreement and Non redemption agreement.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EquityLinkedInstrumentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity-Linked Instruments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EquityLinkedInstrumentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Linked Instruments Policy Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EquityLinkedInstrumentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for equity-linked instruments.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration of Credit Risk</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Credit Risk, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PatentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Patents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PatentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Patents Policy Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PatentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of accounting policies for patents.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Payable and Accrued Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TradeAndOtherAccountsReceivablePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Receivable, net of Allowance for Credit Losses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TradeAndOtherAccountsReceivablePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Cash Used In Investing Activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Flows From Investing Activities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Due to related party</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueToRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Due to Related Parties</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in operating assets and liabilities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock and warrants in connection with the Private Placement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issuance of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">DEBT</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">STOCK-BASED COMPENSATION</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of convertible notes into common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Conversion of Convertible Securities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for interest expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid, Excluding Capitalized Interest, Operating Activity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosure of non-cash financing activities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FPADiscountAccretion_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forward Purchase Agreement discount accretion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FPADiscountAccretion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">FPADiscount Accretion</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FPADiscountAccretion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of FPA discount accretion.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible notes converted to common shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Conversion, Converted Instrument, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReverseStockSplitReclassificationFromCommonStockToAdditionalPaidinCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse stock split &#8212; reclassification from common stock to additional paid-in capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReverseStockSplitReclassificationFromCommonStockToAdditionalPaidinCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reverse Stock Split Reclassification From Common Stock To Additional Paidin Capital</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReverseStockSplitReclassificationFromCommonStockToAdditionalPaidinCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reverse stock split &#8212; reclassification from common stock to additional paid-in capital.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-Based Compensation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign Operations</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Currency Transactions and Translations Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Policy Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of accounting policies for warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value of Financial Instruments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value of Financial Instruments, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Presentation and Principles of Consolidation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Accounting, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Use of Estimates</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Use of Estimates, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recently Issued Accounting Standards</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update and Change in Accounting Principle [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Property and Equipment Estimated Useful Lives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Property And Equipment Estimated Useful Lives Table Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfPropertyAndEquipmentEstimatedUsefulLivesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of property and equipment estimated useful lives.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Potentially Dilutive Common Stock Equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SUBSEQUENT EVENTS</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EmergingGrowthCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Emerging Growth Company</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EmergingGrowthCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Emerging Growth Company Policy Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EmergingGrowthCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The disclosure of accounting policy for emerging growth company.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Reporting</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from Contract with Customer [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling, General and Administrative Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling, General and Administrative Expenses, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Property and Equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of property and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Property, Plant, and Equipment, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromShortTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from short-term notes payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromShortTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Short-Term Debt, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock from exercise of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Warrant Exercises</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashUsedToSettleFractionalShares_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Cash used to settle fractional shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashUsedToSettleFractionalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash used to Settle Fractional Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashUsedToSettleFractionalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of cash used to settle fractional shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from short-term notes payable &#8211; related party</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Related Party Debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Offering costs for common stock and warrants issuance in connection with the Private Placement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Repurchase of Common Stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation to consultants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net income (loss) to net cash used in operating activities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock based compensation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Noncash Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash interest expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Noncash Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Flows From Operating Activities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredChargesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offering and Issuance Costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredChargesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Charges, Policy [Policy Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of RSU Activity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Nonvested Share Activity [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Awards with Market-Based Conditions</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Activity [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfFairValueAssumptionsOfWarrantsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Determine the Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfFairValueAssumptionsOfWarrantsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Fair Value Assumptions Of Warrants Table Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfFairValueAssumptionsOfWarrantsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of fair value assumption of warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Fair Value Measurement of the FPA</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Company&#8217;s Liabilities that are Measured at Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Class [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Building improvements [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leasehold Improvements [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Machinery &amp; equipment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equipment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated useful lives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, Useful Life</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfPropertyAndEquipmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Property And Equipment Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: accumulated depreciation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Property and Equipment [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BuildingImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Building improvements [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BuildingImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Building Improvements [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived, Amortization Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Paid cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OverAllotmentOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriter [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OverAllotmentOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Over-Allotment Option [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TwoThousandTwentyThreeEquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023 Equity Incentive Plan [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_TwoThousandTwentyThreeEquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Three Equity Incentive Plan [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWriteDown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Write off</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWriteDown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Write-down</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash equivalents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents, at Carrying Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Receivables</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Granted shares under plan</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Price per warrant</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Exercise Price of Warrants or Rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Asset, Class [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfRevisedThePreviouslyIssuedInterimBalanceSheetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Revised The Previously Issued Interim Balance Sheets [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockSubscriptionReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock Subscription Receivable [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockSubscriptionReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock Subscription Receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockSubscriptionReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Subscription Receivable Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Patents useful life</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived, Useful Life</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GlobalGrapheneGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Global Graphene Group [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GlobalGrapheneGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Global Graphene Group Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Incentive Plan [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Incentive Plan Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived, Class [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingEstimateLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Significant Accounting Policies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmProfitLossMeasureHowUsedDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CODM description</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmProfitLossMeasureHowUsedDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reportable segment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Reportable Segments</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedPatentsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued patents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedPatentsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Patents, Gross</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentForAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Future amortization expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentForAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CommonStockSharesCancelled_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancelled shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CommonStockSharesCancelled_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Cancelled</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CommonStockSharesCancelled_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of common stock shares cancelled.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFDICInsuredAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal depository insurance coverage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFDICInsuredAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, FDIC Insured Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PriorPeriodReclassificationAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PriorPeriodReclassificationAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prior Period Reclassification Adjustment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReverseStockSplitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse Stock Split [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ReverseStockSplitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reverse Stock Split Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total property and equipment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MachineryAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Machinery and equipment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MachineryAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Machinery and Equipment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Buildings [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Building [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Building [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UnpaidFederalIncomeTaxBalanceOwed_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unpaid federal income tax balance owed (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UnpaidFederalIncomeTaxBalanceOwed_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unpaid Federal Income Tax Balance Owed</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UnpaidFederalIncomeTaxBalanceOwed_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of unpaid federal income tax balance owed.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockholdersEquityDeficitDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders&#8217; Equity (Deficit) (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption price per warrant (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Redemption Price Of Warrants Or Rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Redemption price per share or per unit of warrants or rights outstanding.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsStockPriceTrigger_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock price trigger for redemption of warrants (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsStockPriceTrigger_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Redemption Of Warrants Or Rights Stock Price Trigger</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsStockPriceTrigger_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Price of the entity's common stock which would be required to be attained to trigger the redemption of warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantsSharesExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants shares exercised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantsSharesExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrants Shares Exercised</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantsSharesExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of class of warrants shares exercised.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock, shares authorized</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares authorized (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Authorized</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockVotingRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, voting rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockVotingRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Voting Rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UnitsIssuedDuringPeriodSharesPrefundUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prefunded units</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UnitsIssuedDuringPeriodSharesPrefundUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Units Issued During Period Shares Prefund Units</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_UnitsIssuedDuringPeriodSharesPrefundUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represent the number of shares of prefund units.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Purchase of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants exercise shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Number of Securities Called by Warrants or Rights</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchase Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsRemainedOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants remained outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsRemainedOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Remained Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsRemainedOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of warrants remained outstanding.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputOptionVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Expected Volatility [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputOptionVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Option Volatility [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_OutstandingStockholderPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding stockholder percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_OutstandingStockholderPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Outstanding Stockholder Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_OutstandingStockholderPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stockholder beneficially owning approximately percentage.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Potentially Dilutive Common Stock Equivalents [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockbasedCompensationWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation - warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockbasedCompensationWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockbased Compensation Warrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsSeriesAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants - Series A [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsSeriesAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Series AMember</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPublicMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants - Public [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPublicMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Public Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockConsiderationReceivedPerTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds of deducting fees (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockConsiderationReceivedPerTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Consideration Received Per Transaction</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_MarchPrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">March Private Placement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_MarchPrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">March Private Placement Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPriorNoticePeriodDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior notice periods</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPriorNoticePeriodDays_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Prior Notice Period Days</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsPriorNoticePeriodDays_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of days warrants prior notice period.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsThresholdConsecutiveTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Threshold consecutive trading days for redemption of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsThresholdConsecutiveTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Redemption Of Warrants Or Rights Threshold Consecutive Trading Days</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ClassOfWarrantOrRightRedemptionOfWarrantsOrRightsThresholdConsecutiveTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Threshold number of specified consecutive trading days for stock price trigger considered for redemption of warrants.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of trading days</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Trading Days</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of trading days.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on warrants (in Dollars)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Sale of Derivatives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CommonStockIssuedUponExerciseOfWarrant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CommonStockIssuedUponExerciseOfWarrant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Issued Upon Exercise Of Warrant</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CommonStockIssuedUponExerciseOfWarrant_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of common stock issued upon exercise of warrant.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOptionChangesInFairValueGainLoss1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Non-cash gains (loss) from change in fair value of derivatives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOptionChangesInFairValueGainLoss1_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Change in fair value of derivatives</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOptionChangesInFairValueGainLoss1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Option, Changes in Fair Value, Gain (Loss)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfRatioWarrantsShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of warrants</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfRatioWarrantsShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Ratio Warrants Share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfRatioWarrantsShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of ratio warrants shares.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RelatedPartiesDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Parties (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued of common stock</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Number of Securities Called by Each Warrant or Right</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfWarrantsIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Warrants Issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfWarrantsIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of warrants issued.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfFloorPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of floor price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_NumberOfFloorPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of floor price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IssuedPatentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued patents</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_IssuedPatentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issued Patents Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: accumulated amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived, Accumulated Amortization</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FiniteLivedIntangibleAssetsPatentsPendingnotAmortized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Patents pending (not amortized)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FiniteLivedIntangibleAssetsPatentsPendingnotAmortized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Patents Pendingnot Amortized</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FiniteLivedIntangibleAssetsPatentsPendingnotAmortized_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of patents pending not amortized.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Security, Excluded EPS Calculation [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities, Name [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total common stock equivalents excluded from dilutive loss per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Recapitalization [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PrivatePlacementWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Placement Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PrivatePlacementWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Private Placement Warrants Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_HoldbackSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Holdback Shares [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_WarrantsSeriesCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants - Series C [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOptionQuantitativeDisclosuresLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromOtherDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromOtherDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Other Debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Ex Transition Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseInvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forward Purchase Investors [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Research and development expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense, Total</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AwardsWithMarketBasedConditionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Awards with Market-Based Conditions [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AwardsWithMarketBasedConditionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Awards With Market Based Conditions Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional shares (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Number of Shares, Outstanding, Beginning Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Number of Shares, Outstanding, Ending Balance</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares, Granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Granted shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Shares, Vested</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Shares, Cancelled</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Number of Shares</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockBasedCompensationScheduleofAwardswithMarketBasedConditionsDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock-Based Compensation - Schedule of Awards with Market-Based Conditions (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_DebtDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueDiscountonShortTermNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Discount on short term notes payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueDiscountonShortTermNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Discounton Short Term Notes Payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueDiscountonShortTermNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of discount on short term notes payable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_DerivativesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivatives [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedUnpaidInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued unpaid interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedUnpaidInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Unpaid Interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedUnpaidInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of accrued unpaid interest.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock price targets over the term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Company&#8217;s Liabilities that are Measured at Fair Value [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockOwnershipPlanESOPFairValueOfSharesSubjectToRepurchaseObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated fair value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockOwnershipPlanESOPFairValueOfSharesSubjectToRepurchaseObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Stock Ownership Plan (ESOP), Fair Value of Shares Subject to Repurchase Obligation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockOwnershipPlanESOPWeightedAveragePurchasePriceOfSharesPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock price target, range per share</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockOwnershipPlanESOPWeightedAveragePurchasePriceOfSharesPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Stock Ownership Plan (ESOP), Weighted Average Purchase Price of Shares Purchased</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OfficersCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash bonus</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OfficersCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Salary and Wage, Officer, Excluding Cost of Good and Service Sold</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Quarterly Report</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfRecurringBasisUsingSignificantUnobservableInputsLevel3Abstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Recurring Basis Using Significant Unobservable Inputs Level3 Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, after Allowance for Credit Loss, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventory</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Net</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total operating expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Income (Expense)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense) [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other (expense)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net income (loss) before provision for income taxes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Provision for income taxes</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax benefit</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense (Benefit)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average number of shares of common stock outstanding, basic (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average number of shares of common stock outstanding, diluted (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Recurring [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 3 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeFinanceLeaseRenewalTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sublease term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeFinanceLeaseRenewalTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Finance Lease, Renewal Term</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RentableSquareFeet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rentable square feet</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RentableSquareFeet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rentable Square Feet</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_RentableSquareFeet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rentable square feet.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock price [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock price [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Share Price [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility of underlying stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Expected volatility [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Price Volatility [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FairValueMeasurementsScheduleofDeterminetheFairValueDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements - Schedule of Determine the Fair Value (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsNoteDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Risk free rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Risk-Free Rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Risk Free Interest Rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Liabilities and Stockholders&#8217; Equity (Deficit)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of goods sold</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Product and Service Sold</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockBasedCompensationScheduleofRSUActivityDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock-Based Compensation - Schedule of RSU Activity (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Units [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Restricted Stock Units (RSUs) [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Units (RSUs) [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative Liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfFairValueMeasurementOfTheFpaAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Fair Value Measurement Of The Fpa Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value measurement input</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability, Measurement Input</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfDetermineTheFairValueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Determine The Fair Value Abstract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Small Business</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk free rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesOutstandingPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership limitation percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesOutstandingPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Outstanding Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SharesOutstandingPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of shares outstanding.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PrepaymentShortfallForPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepayment shortfall for purchase agreement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PrepaymentShortfallForPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepayment Shortfall For Purchase Agreement</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_PrepaymentShortfallForPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of prepayment shortfall for purchase agreement.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash payment (in Shares)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Payment</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_CashPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash payment.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CharityCareReimbursementsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reimbursement trust account</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CharityCareReimbursementsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Charity Care, Reimbursements Received</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueStockSubscriptionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock subscription receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueStockSubscriptionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Stock Subscription Receivable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_StockIssuedDuringPeriodValueStockSubscriptionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represent the amount of stock subscription receivable.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccretedDiscountAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accreted discount amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccretedDiscountAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accreted Discount Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccretedDiscountAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accreted discount amount.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from Loans</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Loans</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ExecutiveOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Executive [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ExecutiveOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Executive Officer [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recognized amount</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt, Type [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ConvertibleNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible Notes [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ConvertibleNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Notes Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EFHuttonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EF Hutton LLC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_EFHuttonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EFHutton Member</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GreatPointCapitalLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Great Point Capital, LLC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_GreatPointCapitalLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Great Point Capital LLCMember</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleNotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible notes issued</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleNotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Notes Payable, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ConvertibleNoteSharesOfRemainedOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible remained outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ConvertibleNoteSharesOfRemainedOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Note Shares Of Remained Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ConvertibleNoteSharesOfRemainedOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares convertible note remained outstanding.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate During Period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Effective Percentage</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIncreaseAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unpaid interest expense</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIncreaseAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Increase, Accrued Interest</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends yield rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative liabilities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability, Current</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ShortTermNotesPayableRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term notes payable &#8211; related party</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ShortTermNotesPayableRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Notes Payable &#8211; Related Party</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ShortTermNotesPayableRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of short-term notes payable &#8211; related party.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock price (in Dollars per share)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Price</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Number of Shares, Beginning of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Number of Shares, End of period</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_FairValueMeasurementsScheduleofCompanysLiabilitiesthatareMeasuredatFairValueDetailsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements - Schedule of Company&#8217;s Liabilities that are Measured at Fair Value (Details) [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Grant-Date Fair Value, Granted</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_LocationStatementOfIncomeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Location, Statement of Income [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_LocationStatementOfIncomeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Location, Statement of Income [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SellingGeneralAndAdministrativeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling General and Administrative Expense [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_OperatingExpensesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ResearchAndDevelopmentExpensesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expenses [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Stockholders' Equity [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedInterestOnShortTermNotePayableRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest on short-term note payable - related party</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedInterestOnShortTermNotePayableRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Interest on Short-Term Note Payable Related Party</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_AccruedInterestOnShortTermNotePayableRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued interest on short-term note payable - related party.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Capitalized patent costs</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Intangible Assets</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Flows From Financing Activities:</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RELATED PARTIES</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions Disclosure [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">STOCKHOLDERS&#8217; EQUITY (DEFICIT)</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementNonRedemptionAgreementAndPrivatePlacementFinancingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">FORWARD PURCHASE AGREEMENT AND PRIVATE PLACEMENT FINANCING</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementNonRedemptionAgreementAndPrivatePlacementFinancingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forward Purchase Agreement Non Redemption Agreement And Private Placement Financing Text Block</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ForwardPurchaseAgreementNonRedemptionAgreementAndPrivatePlacementFinancingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Forward purchase agreement, non redemption agreement and private placement financing.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">INCOME TAXES</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">FAIR VALUE MEASUREMENTS</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ErrorCorrectionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CORRECTION OF ERRORS IN PREVIOUSLY REPORTED CONSOLIDATED FINANCIAL STATEMENTS</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ErrorCorrectionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Error Correction [Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfSubleasePaymentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Sublease Rent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfSubleasePaymentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Sublease Payments [Table Text Block]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfSubleasePaymentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire table disclosure of sublease payments.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeFinanceSubleaseDescriptionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Sublease Rent [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_LeasesRentExpenseSubleaseRentals_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Monthly Base Rent</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_LeasesRentExpenseSubleaseRentals_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases Rent Expense Sublease Rentals</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_LeasesRentExpenseSubleaseRentals_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under  leases.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseAnnualRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Annual Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseAnnualRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Annual Rate</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseAnnualRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rental expense for the reporting period incurred under per share.</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfSubleaseRentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Sublease Rent [Table]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_ScheduleOfSubleaseRentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Sublease Rent [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Contractual Term [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Contractual Term [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseFiveMonthPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">7/1/26 &#8211; 11/30/26 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseFiveMonthPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Five Month Period [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseTwoThousandTwentySixPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">12/1/26 &#8211; 11/30/27 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseTwoThousandTwentySixPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Two Thousand Twenty Six Period [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseTwoThousandTwentySevenPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">12/1/27 &#8211; 11/30/28 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseTwoThousandTwentySevenPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Two Thousand Twenty Seven Period [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseTwoThousandTwentyEightPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">12/1/28 &#8211; 11/30/29 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseTwoThousandTwentyEightPeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Two Thousand Twenty Eight Period [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseTwoThousandTwentyNinePeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">12/1/29 &#8211; 11/30/30 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="sti_SubleaseTwoThousandTwentyNinePeriodMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Two Thousand Twenty Nine Period [Member]</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeFinanceLeaseTermOfContract1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease Year</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeFinanceLeaseTermOfContract1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Finance Lease, Term of Contract</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfShortTermDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment of short-term notes payable</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfShortTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Short-Term Debt</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Cash Provided By Financing Activities</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
    <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowElementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosure</link:label>
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