The Arctic Ice Chillin Brew Series is just what you need to keep your beer cold and frosty all day long. This series includes ice packs of a variety of sizes this particular pack weighs 5 pounds and is perfect for larger coolers. Simply toss it in to your cooler with your beer and let it do its job!Arctic Ice Chillin Brew Series cold packs are made with the active ingredient PureTemp. Not derived from petroleum but from plants it is both nontoxic and an eco-friendly alternative to traditional ice packs. These packs also absorb heat around them in order to maintain a stable chilling temperature for your beer.