These Happy Birthday Foil Golden Crown balloons will make any birthday celebration shine! The pack of 5 includes high-quality foil balloons that add a touch of elegance to any party. With their shiny gold finish and royal crown shape, these balloons are sure to be a hit and make the birthday person feel extra special. Floating Time (Helium)The foil balloons, filled with helium, will stay full for 2-5 days. They may float for longer but will start to appear more deflated as they lose helium.