Attention: This drinking water pump is suitable for 1 gallon barrels with a neck of 2.16 inches (5.5 cm). Please check the neck size before purchasing. High-quality materials: This product is made of high-quality BPA-free plastic. The hose is made of food-grade silicone. It is healthy and environmentally friendly. USB rechargeable: Built-in large capacity rechargeable battery. Once fully charged. It can dispense 4 to 6 bottles of water for daily use and outdoor activities. Compatibility: The universal water dispenser fits perfectly on the carafe or bottle with a capacity of (2 gal/7.5 L). (3 gallons/11.3 L). (4 gallons/15 L). (5 gal/19 L). Easy to use: Just attach the small pump to the neck of the bottle or use it on the desk. Once you press the switch. You can use it. It is the best choice for offices. homes. kitchens. schools. etc. The detachable water dispenser is suitable for outdoor/indoor use.