Works with all Platy tubes and reservoirs

　　Fend off frozen drink tubes and help keep liquids cool in hot weather with the Drink Tube Insulator. The updated design offers a completely covered bite valve (to keep it clean and protect it from freezing quickly), a reverse coil polyurethane-coated zipper (to prevent ice/snow buildup), a large zipper pull (to easily open with one hand—even with gloves on), and a hook and loop closure shoulder strap attachment (to secure to a pack). Works with all Platypus drink tubes and bite valves.