Celebrate in style with our Happy Birthday 5 in 1 Helium Balloons Bouquet Set of 5. Each bouquet includes 5 balloons and spells out "Happy Birthday". Perfect for any birthday party, these high-quality helium balloons are sure to impress guests and add a festive touch to your decorations. 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.