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Food Grade Material Water Jug Dispenser: 304 stainless steel metal and water hose.
Battery Operated and Long Battery Life Water Jug Pump: Rechargeable battery inside. Can use for around 4 ~ 6 bottles 5 gallon after a full charged. Note: The charging specification is 5V, 1A. If it is loose on bottle, you need to buy a cap and put on, then it will not loose.