The Kooler Kube makes ice last up to 50% longer. Use it in any cooler to maintain proper temperatures. It has a KoolerGel pre-measured amount already included. All you do is just fill it with water, make sure not to overfill it. The Kooler Kube can be used with or without ice. It's non-toxic, non-hazardous, it's enviromentally safe, reusable, refreezable, AND it can last for years! It's perfect for those long, hot boat days! The Large Kooler Kube is 64 oz.