This pump will fit any water bottle, 2 gallons through 6 gallons, screw-top or crown-top * Original TERAPUMP Brand Manual Water Pump. Don"t be fooled by lesser quality imitations made in China * Unique fastener reduces the amount of germs that could contaminate your water * Adjustable N Bendable Tubes system helps pump to adapt to each size and also allows you to completely empty the bottle * Discharge Spout with a sanitary cap to keep unwanted germs away, no batteries required. Uses vacuum action to dispense as quickly or a slowly as you like