Where ice creates a mess as it melts, our hard shell ice pak will keep your cooler chilly, dry and well-organized! This durable, plastic case is filled with premium, water-based, non-toxic, Perma-Gel®. It's sized for safe and convenient to chilling in your home freezer. When it's frozen, it slips into most cooler bags and boxes with ease. At 3" x 1.125" x 5", it's large enough to provide cooling power, but small enough to cool your lunch, your catch, or your supply of frosty beverages!