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, BPA 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.REMAIN PEFECTLY HYDRATED – This 2L water reservoir can withstand temperatures from -20 to 50 degrees Celsius. The tube resists temperature changes in hot and cold weathers. L 14.2'' x W 6.8'' hydration bladder is compatible with most hydration packs. The tube (0.4” diameter, 40” long) provides a wholesome flow for easy drinking, keeping you hydrated when biking, cycling, hiking, or running!100% LEAKPROOF – You won't be slowed down with our high flow bite-valve. Simply bite the mouthpiece to suck water. Soft mouthpiece with easily accessible ON/OFF valve prevents leakage. It also has a cover to keep dirt out. 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.GET A FREE ITEM and MONEY BACK GUARANTEE – Upon placing your order, you will get a magic bandana at no additional charge. Your purchase is backed by our 100% REFUND PROMISE. If you are not absolutely happy with your purchase of the hydration bladder for any reason, simply send it back for a full refund or to get a new replacement. No questions asked!