We’ve seen plenty of coolers over the years that are designed to keep all your supplies (read: beer) cold while standing up to the elements and the environments you use them in. As it turns out, one of the best beer coolers on the market isn’t even technically a “cooler,” it’s a military grade storage container system from Speedbox. The Endurance-40 (military-grade) is a 300 lb. and 40 gallon volume capacity storage container made from a shatter-resistant roto-molded polymer that’s used by the Army Special Forces, Navy EOD and Air Force Pararescue Jumpers to organize, protect and haul all of their gear. But since it’s made with a built-in gasket, bleed valve and a breather vent, it’s also watertight, airtight and just begging to be used to transport a weekend worth of supplies to the middle of nowhere. The Speedbox Endurance-40 (military-grade) is available in both black and coyote brown colors.