Floral Happy Birthday Foil Balloon, Boho-Theme/Garden Theme Set Of 5 Pcs Celebrate a loved one's birthday with our Floral Happy Birthday Foil Balloon set. With a beautiful boho/garden theme, these 5 pieces will add a touch of elegance to any party. The vibrant floral design will make the birthday girl or boy feel extra special and loved. 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.