CamelBak 90857: The Antidote is your lightweight solution to portable hydration--a reservoir engineered to meet and exceed the demands of military and combat environments. Fashioned from durable, thermoplastic polyurethane film that is 100% BPA/BPS free, the pouch can hold up to three liters of water. The insulated QL HydroLock drink tube is treated with UV guard technology and reinforced to withstand abrasion from everyday wear. Additionally, QL HydroLock allows for convenient one-handed on/off of your water flow, ensuring a secure seal of contents. Quick Link accommodates attachment of any CPC accessory (inclusive of the Usmc filter) with ease.