Deuter's Streamer 3.0 Reservoir is a great upgrade for any hydration system, and a step up from yucky, plastic-like reservoirs. The secret is the special lining that is anti-microbial and taste-free allowing you to keep water in the reservoir for days without fouling the taste. And, the 90-degree bite valve provides easy access, a cover to keep dirt off and excellent flow with a manual shut off that doesn't leak.