Durable, double-wall 18/8 grade stainless steel vacuum construction with copper insulation, which allows your cold beverage to stay cold for 24 hours and at least 8 hours for hot beverages. The construction also prevents condensation on the outside of the tumbler. Easy sipping, push-on lid. Removable, bottle opener design works as a slide closure as well. Wide opening for comfortable filling and pouring. On-trend durable powder coating. Design features the bottom with unique ribbing. 24oz.