The Marka Copper Vacuum Insulated Tumbler features durable, double-wall stainless steel vacuum construction with copper insulation, which allows your beverage to stay cold for 24 hours and hot for at least 8 hours. The construction also prevents condensation on the outside of the tumbler. Comes complete with the on-trend, durable, powder-coated appearance and a push-on, see-through, spill-resistant lid with a silicone closure. The reusable straw is made of 18/8 food-grade stainless steel material and is perfect for drinking cold beverages. Comfortable sipping experience with the silicone tips.