Custom Backpacks, Koozie 5L Hydrating Backpack - 2L Reservoir & Reflective, A great addition for any person who loves the outdoors! Includes a 2L water reservoir which will come in handy on different occasions: camping, concerts, sporting events, etc. Zippered main compartment Includes a replaceable BPA-free 2L water reservoir equipped with a 39.5 inch replaceable tube and a soft push pull bite valve for drinking Reflective accents and air mesh backing on shoulder straps Bungee cords attached to the front to help hold larger items ... #15938 $42.52/each.