Fusion 3L was specifically designed for both Chillbak Cube and Tote waterproof coolers. The reservoir was designed to fit inside both coolers in an exterior insulated compartment allowing for easy water dispensing in group settings, filling vessels, or rinsing dishes. The goal was to create a smaller format reservoir for the Fusion family which features the TruZip waterproof zipper. This helped solidify the brand elements of the new Fusion product line and addresses smaller, more intimate group needs for when Chillback 30 and Fusion 10L group reservoirs are overkill.