Large opening for easy cleaning: This hydration bag has a large opening for pouring water; It is also quite wide, making it easy for hands or bottle brushes to enter the internal water bag of the hiking backpack; The screw cap is easy to disassemble and assemble; For cold water, simply add ice cubes directly from a spoon or refrigerator ice maker; The interior of the water tank is smooth, promoting health and easy to clean High quality: The entire hydration bag is made of high-quality materials; This reservoir will not leave unpleasant odors in your drinks; 2L water bag passed the air pressure test and withstand pressure; Double sealed side technology greatly improves the durability of hydration capsules Maintain moisture: This 2L hydration bag can withstand temperatures ranging from 20 to 50 degrees Celsius; This tube can resist temperature changes in both hot and cold weather; The water bag is compatible with most hydration bags; This 0.4 inch diameter and 40 inch long tube provides a beneficial and healthy flow, making it easy to drink and keeping you hydrated while camping, cycling, hiking, or running Sealed water bag: Our high flow bite valve will not slow you down; Just bite your mouth to drink water; Soft nozzle with easily accessible valves; It also has a lid to prevent dirt from entering; Conveniently control water flow through biting; The quick release tube is detachable; When the tube is removed, the connector will automatically close and the hydration bladder will remain full; Store neatly in the refrigerator/freezer, do not wrap hoses