Water reservoir made ​​of antibacterial film (alloy MPE) made ​​in USA, used in health care. Its unique formula guarantees zero plastic taste and smell – medical tested. Film with maximum abrasion resistance. Large cap for easy filling and cleaning opens and closes just turning ½ turn. Lockable bite valve can be easily controlled with one hand. Rotary mechanical hose holder to strap backpack (20 / 25mm) will help direct the valve where you need it. Handle for easy handling.