Make sure this fits by entering your model number. LARGE OPENING FOR EASY CLEANING & FILLING – Our 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. The 4” 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. PREMIUM QUALITY – The whole hydration bladder is made of premium material. CHERAINTI water reservoir is taste free,, SGS certified and 100% food grade. This tested to comply with international safety standards. 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. Might be the most rigid hydration bladder on the market.