Osprey’s Hydraulics Reservoir by Hydrapak. The HydroStatic backerplate (on 2L and 3L models) provides structure for easy loading into a full pack and maintains a flat profile. Thoughtful design makes filling, cleaning and most importantly staying hydrated on the trail easier than ever. All parts are BPA-free, phthalate-free, lead-free, guaranteed. All materials are certified food safe according to FDA and EU regulations. FEATURES: Twin baffles stabilize water and maintain a flat profile Easy slide top opening seals watertight and provides wide access for filling and cleaning Pour Shield extends the collar to ease filling in shallow sinks Carry handle Magnetic bit valve Hydrapak blaster bit valve offers fast, smooth water flow with 1/4 twist on/off Quick connect system allows for easy removal of reservoir