LoonBalloon HIBISCUS Flower Tropical Hawaiian LUAU Beach 2 18in. Party Mylar BALLOON Set, 18 inch SUMMER ORANGE & PURPLE HIBISCUS, Accent your tropical or luau themed party with this 18in. large unique shape Summer Orange & Purple Hibiscus foil mylar balloon. The perfect balloon for your tropical or luau party, this 18in. 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.