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
Amazon.com : J.CARP On-Off Bite Valve with 5 Color Mouthpieces, Pack of 6 : Sports & Outdoors