Quantity: 1 Accent your unicorn themed party with this 21 unique shape Unicorn Sparkles foil mylar balloon. The perfect balloon for your unicorn party this 21 Anagram 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.