The Thermos Brand Stainless King Stainless Steel 16oz Travel Tumbler is ideal for taking hot or cold drinks on the go. Thanks to Thermos vacuum insulation technology, drinks will stay hot up to 7 hours or cold up to 18 hours. Combined with the reliable Drink-Lock leak-proof lid (when closed) and built-in hook for brewing tea, the Thermos Stainless King Tumbler is the ideal way to make sure your morning routine never loses steam.