For my purposes, I like having smaller dishes for FF as they're quick to clean and I can spread them around to spread the birds out. I stick with ceramic or glass ramekins, cat dishes, mini pie pans - easy to clean, and heavier so they don't tip over as easily (not that it bothers my birds if they do knock them over).
Personally I do worry about plastics leeching chemicals, so I would use food safe containers if you're going that route.
Personally I do worry about plastics leeching chemicals, so I would use food safe containers if you're going that route.