For work or play! Enjoy kept-warm coffee by drinking through the screw-on lid, or place a 12oz cold brewsky inside the tumbler fixed with the interchangeable, rubberized ring. You choose! Our Moonshine vacuum-sealed tumbler has durable, double-wall stainless steel construction with copper insulation, which allows your beverage to stay cold for 24 hours and hot for at least 6 hours with the easy sipping lid. The construction also prevents condensation on the outside of the tumbler. Wide opening for comfortable filling and pouring.