Product Bottle Water Pump Suitable for Universal 2-5 Gallons Bottle, Rechargeable Battery USB Charging Automatic Drinking Water Pump Portable Electric Water Dispenser for Home Kitchen Office CampingTeatureSafe Material: BPA free, food grade silicone hose, 304 stainless steel outlet pipe and durable PP material shell.USB Charging: Rechargeable battery, can be used to pump out about 5 bottled water if fully charged.Fits All Standard Size Bottle: Standard bottle neck size is 2.16 Inch (5.5cm). Compatible with most size of bottles, such as 3.8L, 5L, 7.5L, 10L, 11.3L, 15L, 17Land 18.9L.Extensive use: Portable device ideal for family, kitchen, office, travelling, picnics, children's sporting events, beach days and barbecues.Installation Steps:Connect the silicone tube and stainless steel tubeInsert the silicone hose into the bottle. Then fasten the water pump on the bottle mouth.Press the button to pump water from bottle.Press the button again to stop.Charge it with the USB charger when out of battery.Note:Only use it to pump water, not for any other liquids. Otherwise it will cause damage to the silicone water-entering hose.