Our specially-engineered plastics retain the balloon's shape and offset extreme temperature changes. The material on these oval shaped balloons can be compared to a beach ball but thicker and with a stronger durability. Saying Goodbye to helium tanks and droopy balloons has never been easier. By choosing our Helium Free products, you can finally eliminate the hassles of costly helium. Store and reuse our balloons over and over! Our Balloon Bobber line is specially designed for easy inflation. Just as you would inflate a beach ball, the Balloon Bobber can be inflated by mouth or by air pump. The balloon is sealed with a quick push of the attached stopper, which is cleverly hidden on top of the balloon to stay as true as possible to traditional balloon designs.