EASY CLEANING & FILLING: The wide opening is large enough for your hand to clean the hydration bladder, easy to fill water and add ice cubes. brFOOD GRADE QUALITY: The water bladder is made of PEVA material, BPA free, SGS and FDA approved, safe for drinking. First pull up on the drinking cap, gently bite the mouthpiece with your front teeth to have a sip and start drinking, push back to stop water flow. It conveniently quick and easy to have a drink. UPGARDE LEAKPROOF DESIGN: 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. It also has a cover to keep from dirt. Double sealing side technique makes the water reservoir more durable, it would leak out under 70KG pressure. HIGHER CAPACITY: This water bladder bag is 1.5 Liter. It is the best choice for outdoor, enough for a day drinking of hiking, cycling, climbing, running or biking. 36 x 18 cm in size, the hose length is 99 cm, long enough to drink it straight from the backpack