The Ballooninator is a very peculiar type of balloon. For one thing, it doesn't float, but balloons with gases that are too heavy don't either. This gas is Uranium gas in particular, which has to be harvested from the Uuuniverse. The outer lining of the balloon is made of steel, which also contributes to the "not floating" aspect. One last thing: it explodes on contact with any solid whatsoever. So good luck trying to keep it in the air.