The Chillbak Cube 18 extends the Camelbak Chillbak product line. It was an opportunity to solidify the Chillbak Product family aesthetic and features at a smaller scale. Its welded construction features a fully waterproof roll top closure and expands when packing extra items. The internal closing lid increases insulation and separates dry goods from the main cooler compartment. The Cube 18 also offers a dispensing reservoir compartment on the back panel which is built around the Fusion 3L Group Reservoir.