The EZ-Launch bottle rocket launcher has an internal spring loaded release mechanism. that allows the user to lock the 2 liter bottle in place during the fill up phase and release the bottle with ...

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 ...