Safe MaterialBPA-free water dispenser, food-grade silicone hose, 304 stainless steel, high-density ABS plastic, non-toxic and odorless water bottle pump.HIGH COMPATIBILITYElectric pumping device for pure bottled drinking water, suitable for various models of gallon barrels, no need to pry the lid. Compatible with bottles of different capacities: 4.5L, 5L, 7.5L, 10L, 11.3L, 15L, 18.9L. Note: This drinking water pump is suitable for gallon barrels with a neck of 2.16 inches (5.5 cm).USB Rechargeable Water DispenserBuilt-in 1200mAh rechargeable battery. A full charge will last you 30-40 days or about 4-6 5-gallon bottles of water.Easy to Install and UseThe portable water pump is suitable for outdoor/indoor use. It is the best choice for home, kitchen, office, school, etc. Simply attach the drinking water pump to the mouth of the bottle. One-time automatic switching operation, convenient and quick.After-Sales ServiceIf you have any problems with our water dispenser, please contact us, we will definitely provide a satisfactory solution.