Caddis Sports Cobalt 55 Quart with Wheels Roto-Molded Super CoolerThe 55 Quart Wheeled Cobalt roto molded cooler is rated for up to 5 days ice retention, while also being nearly 20% lighter in weight than traditional roto molded coolers. Maybe more importantly, this cooler is also 40 50% lower in cost than those over hyped brands. Dont worry though, our Cobalt line of coolers still boast all the same great features of other premium roto molded coolers. The 55 Quart Cobalt cooler with wheels is also the perfect