The Tugo Copper Vacuum Tumbler and Can Insulator 16oz. is the next great innovation in drinkware. The Tugo Copper Vacuum Tumbler and Can Insulator 16oz can be used three different ways, you can drink through the screw on lid, through the slide open or just place a 12oz can inside the tumbler fixed with the interchangeable, rubberized ring. The durable double wall stainless steel vacuum construction with copper insulation allows beverages to stay cold for 24 hours and hot for at least 8 hours with the slid open lid. The construction prevents condensation on the outside of the tumbler also. This item will quickly become everyone's go to beverage holder from morning coffee, daytime hydration, to beverages at the end of the day. This will be your clients favorite bottle to take with them anywhere for any event or for employees for repeated use in the office.