Here's what other sites are saying:
The Deuter Streamer-compatible bite valve will keep the flow rate high and your thirst quenched.
- Altrec Outdoors
This is a replacement for any Deuter or Source hydration resevoir.
- Tahoe Mountain Sports
Deuter Helix Bite Valve
Guyot Designs SplashGuard
Nalgene Insulated Water Bottle Sleeve
CamelBak Fresh Reservoir Filter
$15 - $19
MSR SweetWater Prefilter
$1 - $9
Osprey Hydraulics Cleaning Kit
$9 - $24
Ultimate Direction Kicker Cap