Amazon.com: Aquatic Way Bite Valve Replacement Mouthpieces fits Camelbak and Most Brands (4-Pack), with Shutoff Valve and Tube O-Ring for Hydration Bladder and Backpack Water Reservoir : Sports & Outdoors
Bite Valve for Hydration Pack Fits Camelbak w Dust Cover & On / Off Valve UK | eBay
CamelBak Crux Reservoir On/Off Valve - Twisted Cog Bike Shop | Phoenixville PA