Introducing the coolest (or hottest) cup ever! Crafted from stainless steel with proprietary triple insulation, this vacuum-sealed wonder cup just doesn’t quit. It keeps your beverages cold for 9+ hours and hot for 3 hours. This cup is so awesome it stays cold even longer with drinks containing ice, even out in the sun! This tumbler holds 16 ounces and features a slip-proof, silicone bottom; easy grip sides; and a sliding, spill resistant lid.