We love our Supershape foil balloons, theres a shape for everyone! From giant unicorns and rainbows to hotdogs and pints of beer! These balloons look great inflated with helium and mixed and matched with other smaller foil balloons. They can also be inflated by air as all of our foil balloons have a self sealing valve. Simply poke a straw through the valve, blow to inflate, pull the straw out and press down on the seal.