Cody wrote a review of Osprey Packs Hydraform Hydration Reservoir on July 26, 2013
Familiarity: I've used it several times
I like this bladder. Used it when I was building barbwire fence in 95F weather, and it was plenty more than enough water to keep me hydrated. There are a few issues with it tough: when it is hot the PVC tube that goes to the mouthpiece absorbs heat so when you are taking a drink you get hot water for a spell until you purge it with cold water from the bladder. and I am not totally a fan of the formed plastic in it either.. because when it is fitted into my Aether 85 backpack it doesn't form to your spine because its too high up, and the piece is not removable.
I do like the ruggedness of it though! it is far from flimsy and extremely easy to clean.