Double-wall vacuum insulated. The Load-and-Lock Gasket secures your drink in place, and No Sweat Design keeps your hands dry while your drink stays cold. The Colster Stubby Holder is designed to fit 375ml bottles and cans Made with kitchen-grade stainless steel, so they’re puncture- and rust-resistant Keeps cold drinks cold and hot drinks hot until the last sip Dishwasher safe Prevents condensation, keeping hands dry.