Easy to Fill and Clean: The water bladder has a large opening with a diameter of 9 cm. You can easily drop ice cubes or fruit pieces into the water bladder by lifting the handle, or put a brush or a hand into the bag to clean it Food Grade Quality: The inner part of the water bladder is made from TPU, with no odor/ toxic, BPA free for safe use. We have 1.5 L, 2 L, and 3 L models for your option Upgraded Leakproof Design: A soft mouthpiece with an on-off valve prevents leakage. The water will not leak out with no bite. It has a dust cover to prevent dirt. Dual-edge-sealing technology gives it pressure and heat resistance, making the water bladder more durable. It won't leak out until 70 KG pressure Large Capacity: The dimension of the water bladder's main body is 36* 18 cm, and the soft hose is 99 cm long, ensuring you can drink straight from your backpack. It can be disassembled in the middle to fit in your backpack, and it is also resistant to TEMP changes, helping you be hydrated enough anytime in outdoor activities After-sales Service:If the water bladder and backpack suit is out of your expectation, feel free to contact us anytime. We will offer you a satisfying solution within 24 hours JOYHILL Outdoor Backpack Reservoirs