Icemule Coolers The Icemule Classic Medium brings together the best of both worlds - the portability of a backpack and the ice-keeping performance of a hard cooler. With its thick fabric and reinforced seams, this is an everyday cooler designed for outdoor performance. Hold up to 12 cans plus ice, or 5 wine bottles plus ice, and explore the world with easy-carry padded straps. Conquer adventures with no zippers and ultimate insulation from Icemule, the only cooler like it!