Hydrapak Shape Shift Reversible Hydration Bladder Reservoir Locking the Snap-Zip baffle in place gives our hydration reservoir /bladder a slim profile and sits flatter against the back BPA Free The complete hydration system includes our Straight Shot Plug-N-Play, 36-inch Hydraflex tube, Elite Surge Valve, and Elite Quantum clip Reversible and the easiest to clean on the market. 70 oz. (2 Liter): 6  x 12