Soda Bottle Water Rocket Preassembled Launcher Toy Soda bottle water rocket launcher 95% preassembled. 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.