Deuter Streamer Helix Valve

The Helix Valve Kit (patent pending)
This high flow silicon bite valve features a convenient manual shut-off to prevent drainage during transport - just twist on for the ride, and twist off for the drive home. To drink, just bite down in the outer groove, which pushes the internal plunger back, and lets the water flow freely! If it needs a cleaning, twist halfway between On and Off, pull off, and swab out with a little rubbing alcohol - make sure to rinse out thoroughly before drinking again. When not in use, you can put on the black dust cover so no dirt gets onto the mouthpiece.

Occasionally, without notice, manufacturers change product design and/or specifications.