10 Pack 18 Inch Iridescent Heart Foil Balloons – Rainbow Gradient Self-Sealing Balloons for Weddings, Birthdays & Valentine's Day

These 10 iridescent heart foil balloons from Biapian are 18-inch transparent rainbow heart-shaped balloons that reflect light in shifting colors. Designed for air inflation only (helium not recommended), they include a straw and white ribbon, and feature a self-sealing valve. Ideal for wedding, birthday, Valentine’s Day, baby shower, and mermaid party decorations.

How do these iridescent heart balloons work with air?

Each balloon is made from a durable, shiny foil with a self-sealing valve. Inflate them using the included straw or a pump to about 85–90% of their full capacity to avoid overexpansion. The valve seals automatically, so no knot tying is required. Because of the iridescent coating, these balloons do not float with helium; for a suspended look, hang them upside down from the ceiling with the ribbon.

Size and technical details

Which occasions work well with these rainbow heart balloons?

Their shimmering multicolor finish makes them versatile for nearly any celebration. Use them as a photo backdrop at a mermaid-themed party, create a bouquet for a Valentine’s Day surprise, or scatter them on the floor for a baby shower. They also work for engagement dinners, bridal showers, anniversaries, Christmas, New Year, and birthday decorations. The glossy surface catches light differently from every angle, adding a dynamic, magical feel.

Frequently asked questions about these 18 inch balloons

Can these balloons be filled with helium?
No. The iridescent material is not helium-friendly. Inflate only with air. For a floating effect, hang them upside down from the ceiling or a balloon weight.

Do I need to tie the balloons after inflation?
No. Each balloon has a self-sealing valve that holds the air in once inflated. No knotting required.

Are these balloons safe for children?
These are foil balloons. As with all balloons, there is a choking hazard from un-inflated or broken balloons. Supervise children during play.

What is the best way to inflate them?
Use the included straw or a hand pump. Inflate to about 85–90% to avoid overstretching the foil.

These iridescent heart balloons combine a striking rainbow sheen with practical self-sealing convenience. Whether you're styling a dessert table or creating a whimsical balloon arch, they bring a luminous, romantic touch that suits both intimate gatherings and large parties.