Accent your under the sea themed party with this 30" large unique shape Glitter Seashell foil mylar balloon. The perfect balloon for your under the sea party, this 30" Betallic 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.