The Mammoth 12 oz. Chillski is the ultimate way to keep your canned or bottled drink cold for hours. It is double-wall vacuum insulated which will keep your beverage up to 10X longer than a standard can holder. The Chillski is built with 18/8 durable stainless steel. The screw on collar seals the can or bottle securely inside the insulated body, making it the ultimate drinking experience.