Keep your beverage cold for hours at the campsite with Stanley's Adventure Vacuum Stein. Made from 18/8 stainless steel, this vacuum-sealed stein is durable and strong, so you can pack it, drop it, use it, and wash it without damaging it. The double-wall vacuum insulation keeps your drink of choice cold for up to seven hours, ensuring constant refreshment, while the dishwasher-safe design allows you to put it through the paces.