HDE Manual Drinking Water Pump Universal Drinking Dispenser Water Hand Pump for Bottled Drinking Water Cooler Jugs Easy to use water cooler pump fits most 5 or 6 gallon water bottle jugs, delivering 8 ounces of water in seconds No batteries required, uses vacuum action to dispense as quickly or a slowly as you like Innerlocking tube system helps pump water to adapt to each size and also allows you to completely empty the bottle Unique fastener fits most screw top jugs and reduces the amount of germs that could contaminate your water Compatible with most plastic water jugs like Primo and Culligan | Does not fit: AmericanMaid 5 Gallon or other plastic water bottles with 53mm caps