2 Liter Hydration Bladder

 Large opening, allows you to fill with water and ice cubes, easy to clean.  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.  This 2L water reservoir can withstand temperatures from -20 to 50 degrees Celsius. The tube resists temperature changes in hot and cold weathers.