LARGE OPENING FOR EASY USE - Our hydration packs have a large opening for easy filling.The 4" screw-on cap opens and closes easily. For cold water, simply add ice directly from a spoon or refrigerator ice dispenser. The inside of the water reservoir bladder is smooth to promote health and easy to clean. PREMIUM QUALITY - The entire water bladder is made of high quality materials. The water storage bladder is tasteless and odourless, SGS certified and 100% food grade. The water bladder has also passed the air pressure test. The double-sided heat sealing technology greatly improves the durability of the bladder. STAY WELL HYDRATED - This 2L water bladder can withstand temperatures ranging from -20 to 50 degrees Celsius. The hose resists temperature changes in both hot and cold weather. L 14.2'' x W 6.8'' bladder is compatible with most water bags. The conduit (0.4" diameter, 40" long) provides ample water flow for easy drinking, keeping you well hydrated while biking, cycling, hiking or running! HUMANISED DESIGNED BLADDER BAG - Simply bite down on the mouthpiece to suck in water. The bladder bag has a high-flow bite valve. The soft mouthpiece has an easy open/close valve. It also has a cover to keep dust out. Removable quick-release tubing. When the tube is removed, the connector will automatically close and the bag will remain inflated.