100% brand new and high quality. Large Opening: 2.5L water bladder with largest opening, which helps you easily to fill the water and ice cubes into your bladder bag, and easy to clean. Leakproof Design: Double soldering sealing design ensures the water bladder 100% leakproof, with auto-shutoff valve, there will be no any leaks even the tube is detached accidentally. Withstand Temperatures: This 2.5L water reservoir can withstand temperatures from -20 to 50 degrees Celsius. The tube resists temperature changes in hot and cold weathers. Occasions: Our water bladder perfect for camping, hiking, biking, running, cycling, climbing, backpacking, hunting & skiing, any other outdoor sports you like.