LoonBallon 30 Inch Butterfly Balloon, Accent your Tropical & Luau themed party with this 30in. butterfly shaped Beautiful Tropical Butterfly foil mylar balloon. The perfect balloon for your Tropical & Luau party, this 30in. party balloon is great for setting the scene! This balloon includes a self-sealing valve, preventing the gas from escaping after it’s inflated. The balloon can be inflated with helium to float or with a balloon air inflator. Balloon arrives uninflated