Whatever you currently use for a squirt gun pales in comparison to this new toy- the RPG-7 Water Rocket.
Japanese company Marudai has developed the ultimate weapon in the water-gun universe. It’s a water rocket-propelled grenade launcher, and it fires water bottle rockets. Just think of the fun you could have annoying your neighbors!
RPG-7 distance and accuracy depend on water quantity, psi (pressurization a product of a pump and human elbow grease), launch angle, and wing stability. At 20 ounces, stated range is 33 to 115 feet; a smaller, 13.5-ouncer will soar 65 to 98 feet.