Osprey hydraulics 2l reservoirospreys hydraulics 2l reservoir is perfect for large volume packs and long duration activities the hydrostatic backer plate provides structure for easy loading into a full pack and maintains a flat profile bpa and lead free reservoirthe considerate design makes filling cleaning and most importantly staying hydrated on trails easier than ever all parts are bpa free phthalate free and lead free all the materials used in the manufacture of the hydraulics 2l res