LOONBALLOON Animal Theme Balloons, PENGUIN – BLACK, Accent your ocean or sea themed party with this 31in. large unique shape Happy Penguin – Black foil mylar balloon. The perfect balloon for your ocean or sea party, this 31in. 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. 31in. Happy Penguin – Black Balloon