Hydration Bladder 2/3 Liter - Water Bladder for Hydration Pack UPGARDE LEAKPROOF DESIGN: The water bladder for backpacks is quadruple protected from leaking. Well sealed sliding mouth piece, screw cap, pull and upgrade bite valve on the mouth piece, self-lock connector(water will not leak out when the hose is removed). Provide all-around protection and there were no leaks or no mess anywhere. No warry about leaks anymore. HIGHER CAPACITY:Capacity | 3 Liter (100oz), 100% odorless, tasteless, BPA- Free EVA material. the biggest not the best, chose a size that fit your backpack. A replacement Hydration bladder for most hydration packs and backpacks LARGE DUAL OPENING: Our 3L hydration bladder pack has a screw cap and a large top opening for easy fill, refill and add ice cubes. The wide opening top is large enough for your hand to reach in to clean the bladder pack. Larger dual opening support convenient clean. EASY TO DRINK: Only 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 in hiking, camping, climbing, biking trip and all outdoor events. BUY WITHOUT RISKWater Bladder of Brand Swamerfa offers 90 days money back quality warranty. Nice 7/24 customer service also never let you down!