85 oz/2.5L Reservoir with Tube Cover - Surplus Militaire Pont-Rouge
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
Kryptek Highlander Tactical Hydration Pack Drink Tube Cover Sleeve for sale online | eBay
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