Great customer service, if you have any problems wiht the item, our customer service team will solve your problems within 12-hours.Safe Material: BPA free drinking water dispenser, food grade silicone hose, 304 stainless steel, high density ABS plastic, no toxic, and no smell.High Compatibility: The electric pumping device suitable for pure bottled drinking water, suitable for a variety of models gallon barrel without pry the lid.USB Rechargeable Battery: Built in rechargeable 1200mAh battery. Can used for 30-40 days or around 4-6 bottles of 5 gallon water once full charged. No need to charge every day.Easy to Use: Simply fasten the small pump on the bottle mouth. One switch operation, totally hassle free even for kids and elders.Note: The drinking water pump is suitable for gallon barrels with a 2.16-inch (5.5cm) neck. Please confirm the size of your neck before purchasing.