Get the Rocket Pump from AntiGravity Research Corporation to ensure an astoundingly satisfying water rocket / pop bottle rocket experience every time!  The most important component in your water rocketry toolkit is your air pump.  The Rocket Pump has a special steel pressure reservoir canister that dissipates heat and absorbs pressure peaks to help your rocket make the best possible use of your air pumping energy.  There are a lot of air pumps on the market and here at AntiGravity, we've tried 'em all.  None stand up to the rigours of water rocketry / pop bottle rocketry like the Rocket Pump does. The Rocket Pump.  Send more rockets higher.                                                            * * * * *