Some of Leo Bodnar's balloons have circumnavigated the Earth multiple times. The small foil balloons don't expand like a latex balloon does, so they can hold a

Some of Leo Bodnar's balloons have circumnavigated the Earth multiple times. The small foil balloons don't expand like a latex balloon does, so they can hold a stable altitude without bursting. http://www.leobodnar.com/balloons/ http://www.leobodnar.com/balloons/