Introducing the 90th Birthday Balloon Circle! Our foil balloons come in a variety of shapes and colors, offering a premium quality that surpasses traditional latex balloons. While they may be a bit pricier, their durability and air-tightness make them a worthwhile investment. When inflated with air, these balloons can last for months without significant changes, and when filled with helium, they can float for approximately 3-7 days, depending on the surrounding temperature and balloon volume. Each balloon features a self-sealing valve that prevents air or helium from escaping after inflation. To inflate, we recommend using a hand pump or a drinking straw. For decoration inspiration, visit www.party-narozeniny.cz. The balloons measure 42 cm and can be filled with either helium or air, with a volume of 13 liters. Please note that all our foil balloons have self-sealing valves; inflate them with a hand pump for best results. After inflation, the balloons will seal themselves, and you can top them off through the sealing valve as needed.