PREMIUM QUALITY: All parts of the WRELS hydration bladder are made of premium material . WRELS water reservoir is taste free, BPA free. It won’t leave a bad taste in your drink. The water bladder passed pneumatic pressure test, it is pressure-tolerant. Double sealing side technique has greatly improved durability

LARGE OPENING FOR EASY CLEANING AND FILLIN: WRELS hydration bladder has one of the largest opening on the market. The big opening makes for easy pouring of water. It is also fairly wide for a hand or bottle brush easily access to the interior hydration bladder. Screw on cap goes on and off easily. For cold water, simply add ice cubes directly from a scoop or refrigerator ice dispenser. The smooth inner of water reservoir promotes health and is easy to clean

100% LEAK PROOF: Soft mouthpiece with easily accessible ON/OFF valve prevents leakage. Conveniently control the water flow by biting, when not bite, the water will not leak out. Quick-release tube is detachable. Auto shut off while the tube is removed, the hydration bladder will stay filled non-leaking, store neatly in fridge/icebox without tangling hose