Experience the ultimate in hydration with this 30 oz. durable, powder-coated stainless steel tumbler. Featuring double-wall 18/8 grade construction with copper insulation, this tumbler keeps your drinks cold for a remarkable 24 hours and hot for at least 8 hours. Say goodbye to condensation and enjoy easy sipping with the push-on lid and slide closure. The wide opening makes filling and pouring effortless.