Allen K.wrote a review of Osprey Packs Hydraulics LT Hydration Reservoir on April 23, 2018
Familiarity: I've used it several times
Bought this for my 6yr old daughter's 12L backpack and it fit perfectly. She has used it several times on 1 to 3 hour hikes and has yet to drink it even close to dry. I did cut the mouth piece tube shorter to make it more her size. I have the 2L version myself and the quality in both are superb. Another great product from Osprey.