I purchased the 2L Hydraulics bladder. The Osprey has a fold-over design with a guided clamp to keep the fluid from soaking everything you wished to keep dry in your pack.Keep your reservoir clean with the Osprey Hydraulics™ Cleaning Kit. Included with the kit is a ladder expander that holds the reservoir open to dry after use. Two specially designed brushes, one for the reservoir and one for the hose keep all the corners and channels in top condition.
Osprey Hydraulics LT Reservoir For the release of new pack designs in 2019, Osprey collaborated with Hydrapak to create the new Osprey Hydraulics LT 2.5L and 1.5L reservoirs.