CamelBak Hydrolink Big Bite Valve Cover | 4.8 Star Rating Free Shipping over $49!
Amazon.com : Hydration Tube Covers Bladder Insulators are Compatible with Camelbak Reservoir Water Bladder. Will fit MIL Spec Antidote and Crux : Outdoor Backpack Reservoirs : Sports & Outdoors
US Military Camelbak Type-2 Hydration System Valve Kit / Cover / Bite Valve NIB - International Society of Hypertension