High Sierra 2.0L Packaged Reservoir Hydration Pack Resevoir, Vertex Bladder by High Sierra

High Sierra 2.0-Liter Reservoir has a hands-free pressure valve with an insulated water tube cover to keep water from freezing in cold weather. It has double-welded seams for durability and the reservoir opening accepts water filters.

Owner Reviews, Ratings, Comments and Criticism
I had this thing break open in my pack my first time using it skiing. It might be fine if you don't lean against it while on a chairlift but all it did for me was to soak my backup layers and everythnig else in my pack. Compete garbage.