Yeti Rambler Colster 12oz Can Insulator - Cosmic Lilac Whether relaxing on the boat or kicking it back at camp, the Yeti Colster will keep your favorite beverages cold. The Yeti Rambler Colster is a can insulator with double-wall vacuum insulation that will keep classic 12 oz. cans and bottles chilled. The Rambler 12oz Colster features a newly evolved Load-and-Lock gasket. With just a quarter-turn, the gasket secures your can in place. Available in plain stainless steel or with a Duracoat color,