xkcd

When my dad was a kid he used to fill up the empty bags bread comes in then climb up on the fairly flat roof of a shed and throw them at his twin sister. I’m sure those were at least a liter, probably more.

Although thinking about it, 200 ml seems small. I would think I’ve usually been more in the neighborhood of 500 ml when filling them.

Use use normal balloons. If you don't fill them enough though, they're hard to pop.