Amazon.com : CamelBak Big Bite Replacement Hydration Pack Valve, Blue, One : Hiking Hydration Packs : Sports & Outdoors
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