Rose, it isn't so much about the container, as it is about the potting medium / environment.

I've successfully started leaves in:

• Ziplock bags
• Fish bowl
• Tupperware
• 2" pot
• Community tray
• Glass of water.

The main thing to look out for is not to keep the soil or whatever you are using too wet. Straight Water being the exception.

I use 50/50 African violet mix with perlite. Others have their own recipes, some use straight vermiculite, others a perlite/vermiculite blend.

Water when near dry, but don't keep them soggy. If they dry out, moisten with a bit of water, then properly water the next day.

Once you get the hang of it, you'll have dozens of spares!

Happy growing!

Karin