Thanks to our industry-defining double-wall stainless steel construction, the Stainless King™ Tumbler’s vacuum insulation is as powerful as it gets. Keep beverages hot for up to 7 hours. Keep ‘em cold for up to 18. Cause if you’re like us, you want your hot coffee to be hot for your whole commute and the first read through your inbox. Combined with the reliable DrinkLock™ leak-proof lid (when it’s closed, people) and built-in hook for brewing tea, the Thermos® Stainless King™ 16-ounce Tumbler is the perfect way to make sure your morning routine never loses steam.