Easy to assemble metal water rocket launcher with a 125 PSI ... StratoLauncher IV Ultimate will propel a 2 liter plastic (PET) soda pop bottle over 350 ft. in the sky. Watch the last minute ...

In this case, though, we’ll respectfully disagree with [Zach Hipps] assessment of his remote-controlled soda bottle rocket launcher ... flange on the necks of 2-liter soda bottles.

This water rocket launcher lets you do just that ... If you’ve already got a compressor and some empty 2-liter bottles you might also pick up some extra PVC to make this pressurized water ...