TeraPump TRPMW200V Snap-on Type Manual Drinking Water Pump Fits most any Crown Top 5 or 6 Gallon Bottles (NOT for screw top finishing Bottle) Simple Snap on Type easy to install (No more screw fastener at the neck) This snaps on, which makes it completely air tight, this increases the pumps performance Discharge Spout with a sanitary cap to keep unwanted germs away