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 Yeti Colster Stubby Cooler is designed to fit 375ml bottles and cans. Made with kitchen-grade stainless steel, so they’re puncture and rust resistant, the Yeti Colster Stubby Cooler 2.0 keeps cold drinks cold and hot drinks hot until the last sip.