Great for an overnight camping trip, a day at the beach or a backyard barbecue, the YETI Hopper Flip 18 Cooler is a stellar size for carrying everything you need without weighing you down. This cooler is durable and sturdy with a waterproof Dryhide Shell that resists punctures, mildew and UV rays. Coldcell insulation keeps your food and drinks cold all day with closed-cell rubber foam, and the waterproof Hydrolok zipper keeps moisture from getting in or out.