TERA PUMP TRPMW100 2D Battery Operated Drinking Water Pump (EXCEPT GLASS BOTTLES) BPA-FREE 1 GPM Battery Powered Drinking Water Pump | Does Not Include 2 D Batteries Fit Various Bottles: You can use out pumps for most 5-6 gallon crown top water bottles For use withcrown-top bottles,Screw-top will not fittightly but will work fine Discharge Spout with Lid: Prevent drippage with the lock-tab lid No need to worry about hygiene Our pump has Simple twist on/off mechanism Unscrew the cap on the pump handle and insert <span class="a-text-bold"><span class="a-text-italic">two &#034;D&#034; size batteries</span></span> checking the polarity into the compartment. Adjust the bottle cap to the height of container and fix the pump with the fastner. Make sure to keep the tube cover <span class="a-text-bold"><span class="a-text-italic">1/4&#034; to 3/4&#034;</span></span> above the bottle of container for the <span class="a-text-bold"><span class="a-text-italic">best performance.</span></span> Assemble the<span class="a-text-bold"><span class="a-text-italic"> discharge spout </span></span>firmly to the <span class="a-text-bold"><span class="a-text-italic">discharge hole</span></span> Click the switch to turn on the pump and click again to <span class="a-text-bold"><span class="a-text-italic">stop. </span></span>To use just in short time,<span class="a-text-bold"><span class="a-text-italic"> push down </span></span>a little and hold the<span class="a-text-bold"><span class="a-text-italic"> switch</span></span>