The Water Cooler Backpack - Harness backpack ideal for carrying coolers water jugs or 5 gallon buckets on long hiking trips picnics or ball games. Shop wisely and avoid purchasing a completely new water cooler backpack because Strap Pack will let you repurpose the cooler you have. It’s a padded harness with adjustable shoulder straps so a heavy cooler can be carried on the back. It has adjustable length velcro straps that fit any standard cylinder size cooler. Cooler not included. 3 colors available: blue gold black.