About this item HOW TO CLEAN = Be sure to wash your bladder before your first use: Rinse out your bladder with lemon juice or mild soap and warm water Imported MILITARY GRADE QUALITY: Hydration bladder is made of premium materials. It won’t leave a bad taste in your drink. The water reservoir bladder passed pneumatic pressure test, it is completely pressure-tolerant. Double sealing side technique has greatly improved durability. 100% LEAKPROOF: Upgraded 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 2 liter water reservoir will stay filled non-leaking NO TASTE & EASY TO DRINK: You won't be slowed down with our high flow bite-valve. Simply bite the mouthpiece to suck water. Pull to drink and push back to lock. It also has a dust proof cover to keep it clean. It conveniently quick and easy to have a drink in hiking, biking, cycling, climbing, backpacking, hunting, running, camping, and all outdoor sports REMAIN COLD HYDRATED: This hydration pack bladder can withstand temperatures from -68 to 122 degrees Fahrenheit. The tube resists temperature changes in hot and cold weathers. L 13.8'' x W 6.8'' water bladder is compatible with most hydration packs. The tube (0.4'' diameter, 36'' long) provides a wholesome flow for easy drinking, keeping you hydrated. LARGE OPEN FOR EASY FILLING & CLEANING: The 2L hydration bladder opening design is so large that you can fill / refill water easily even you are not taking it out of hydration backpack. Also can put some big ice cubes into water bladder to keep water cool. Large opening help you reach every corner inside, and give your water reservoir bladder thorough cleaning.