- Material: Our water dispenser is crafted from BPA-free drinking water safe materials including a silicone hose, 304 stainless steel, and high-density ABS plastic. It is non-toxic and odorless for safe drinking. The USB charging feature and one-button operation allow for immediate water dispensing, making it quick and convenient to use. - Great Compatibility: This water bottle pump fits 2.16-inch (5.5cm) neck gallon barrels without needing to pry open the lid. It is compatible with various bottle sizes including 4.5L, 5L, 7.5L, 10L, 11.3L, 15L, and 18.9L. Note: It is not compatible with threaded or screw-top bottles. Please verify the neck size before purchasing. - USB Rechargeable: The electric water dispenser is equipped with a rechargeable 1200mAh battery, allowing it to be used for 30-40 days or approximately 4-6 bottles of 5-gallon water on a single charge. This feature is great for daily use at home or during outdoor activities, eliminating the need to lift or flip heavy water bottles. - Easy Operation: Simply attach the water pump to the mouth of the bottle. The automatic switch operation is user-friendly, making it hassle-free for anyone to use, including children and the elderly. - Versatile Use: This convenient and portable water dispenser is ideal for picnics, home, kitchen, and office daily use, as well as for outdoor activities. It simplifies water dispensing, providing a practical solution for hydration needs without the fuss.