Ospreys Hydraulics 1.5L Reservoir is suited for smaller volume packs and light and fast activities where stability and weight are critical. Stability is ensured via smartly designed baffles helping maintain shape and 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.