LARGE OPENING FOR EASY CLEANING The 2L hydration bladder has a large opening, and the large opening makes it easy to pour water. It is also wide enough to allow one hand or a bottle brush to easily access the inner hydration bladder of the hiking backpack. The screw cap is easy to put on and take off. For cold water, simply add ice cubes directly from a spoon or a refrigerator ice dispenser. The smooth interior of the water reservoir promotes health and is easy to clean. STAY FULLY HYDRATED This 2L hydration bladder can withstand temperatures from 20 to 50 degrees Celsius. The tube resists temperature fluctuations in hot and cold weather. The L 36 cm x W 17 cm hydration bladder is compatible with most hydration packs. The tube, 0.4" in diameter and 38" long, provides a healthy flow rate for easy drinking, keeping you hydrated while camping, biking, cycling, hiking, or running! GOOD SEALING WATER BLADDER - You won't be slowed down thanks to our high-flow bite valve. Simply bite down on the mouthpiece to draw in water. Soft mouthpiece with easy-access ON/OFF valve. It also has a cover to keep dirt out. Easily control the water flow by biting. The quick-connect tube is removable. When the tube is removed, the connector automatically turns off and the hydration bladder remains full. Store carefully in the refrigerator/fridge without the hose getting tangled.