PearlJamPSUwrote a review of Osprey Packs Hydraform Hydration Reservoir on November 6, 2012
Familiarity: I've used it several times
This is an excellent, well-built bladder that seems to be as durable as a hydration reservoir can be. The bite-valve does not leak, there is not an aftertaste, and the wide opening makes filling it up a snap. The backside is constructed with a fairly rigid plastic/nylon spine which keeps the bladder from collapsing, bunching up, or moving while in a pack.
At the top, above the lid, is a sturdy plastic handle which allows it to be easily and safely hung in a pack while a small, handy loop, which makes post-use hanging/drying very easy, can be found at the other end.