- Health and safety: our usb water dispensers are made of ABS eco-friendly materials, 304 stainless steel outlet tubes, food grade silicone hoses, safe, non-toxic and odorless, suitable for many occasions. . - Practicality and Compatibility: This electric water dispenser is a new model in 2021, suitable for 2-5gal general water bottles with a 2.16 inch (55mm) bottle neck. Please confirm your neck size before placing an order. Small and portable, it is very suitable for office, outdoor, public square, hotel, picnic or camping activities. . - Long battery life: this 5 gallon water bottle pump has a built-in 1200mah rechargeable battery, which has long battery life, no noise and can be used at night. Use the included USB cable for easy charging. After fully charged, it can be used for 30-40 days, or it can pump 5 bottles of 5 gallons of water. .