Helix Valve: The new mouthpiece is drip proof and has a water stop tap. The tap is opened by a simple quarter turn. With light pressure, the water flow is activated and flows at a comfortable rate. The integrated spring valve causes the mouthpiece to shut automatically. The Helix Valve is easy to take apart and clean. Compatible with the Deuter Streamer 2.0L 3.0L Hydration Reservoirs
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