Birando Hand Held Air Compressed Confetti Cannon (17.5 Inch, Mixed Color Eco (water soluble) Birando's Rainbow Confetti Cannons are hand held cannons which use compressed air to launch the pre-packed confetti and shower your party & guests. Easy to use, simply aim and twist Our compressed air confetti cannons use no explosives and emit no noxious gas. they are one time use only.Caution - contents under pressure. Do not point towards anyone and this is not a toy and children should not use it. This Confetti Cannon has water soluble confetti. Good for outdoors! Simply hose it down after the party and it will be gone by next morning. Easy clean up. Confetti Cannons are pressurized and cannot be shipped via Express Services; they are shipped via Ground Services only.