Our leak proof TKWide Insulated Wide Loop Cap increases the thermal performance of our TKWide bottles with its integrated one-piece vacuum insulated stainless steel center. The cap creates a full stainless steel interior with double silicone gasket seal. The TKWide Insulated Wide Loop Cap features low profile design, easy-carry swivel loop handle and is dishwasher safe. The cap is backed by the lifetime Strong as Steel guarantee for a lifetime of use from your Klean Kanteen solutions. NOTE: Compatible with TKWide insulated bottles only (with internal threads).