The Camelbak Crux wins our Best Buy Award for its impressive performance and fair price. The Crux is the latest Camelbak bladder in a lineage that goes back decades; it may be the oldest running hydration reservoir. Over the years CamelBak has continually modified this bladder. It now has a large wide mouth opening, large grab handle for filling, two chambers for water to reduce sloshing and a removable hose. The bite valves are our favorites because the size is right and the locking mechanism is easy to operate.
A huge plus is the limited lifetime warranty which further enhances its long-term value. We highly recommend this bladder if you're on a budget and don't mind a little extra work cleaning (if you use sports powders). If you're willing to spend a bit more and want the extra features of a pressurized system, check out the Editors' Choice, the Geigerrig Hydration Engine. Another awesome contender that is about the same price but offers a flip-top design (with many additional features) is the Osprey Hydraulics LT Reservoir. It just doesn't have the bomber reinforced TPU film that is more puncture resistant.