[DannL]

Or,
Maybe perfume atomizer balls?
http://www.paradise-co.com/ballcaps/index.html

There we go, that's what I was thinking.

I doubt that the original was fexible like a balloon, but more like a bota bag that just inflated. You can make a miniature bota bag by coating cloth with pitch, tar or just paint on the inside. But, then you would have to put your sewing skills to work.

Maybe that's not a good idea.

Go wrangle up a blowfish.