YETI. RAMBLER COLSTER BEVERAGE INSULATOR. BLACK. The YETI Colster keeps cans and bottles so cold for so long that you ll have to rethink your understanding of a few natural laws. Standard 12 oz. cans and bottles fit like a glove -- a glove with double-wall vacuum insulation. The Load-and-Lock Gasket secures your drink in place and No Sweat Design keeps your hands dry while your drink stays cold. Available in stainless and DuraCoat colors.