Soda Bottle Water Rocket Launcher Fabricated Parts Kit Soda bottle water rocket launcher prefabricated parts kit. With adjustable trigger, launch pad, and instructions for assembly and launching. Launcher will enable you to propel a 2 liter plastic (PET) soda pop bottle over 350 ft. Supports most .5L, 1L, 1.25L & 2 liter soda bottles @ air pressures as low as 20 PSI up to 120 PSI Great item for people of all ages for fun, science projects, school classes, parties, etc.