I use food cups that came with my cages. The coturnix would have to jump in them to scratch the food out. Works for me. I had issues with my buttons dust bathing in theirs sooo I found an alternative to that. Take pvc and cut holes in it with a circular saw (I have someone else do it because I am prone to stitches), add little wood legs to it and it's a feeder
The button pairs eat and then the males court their mates, and I change the food for them every other day
I give them meal worms once a week now since the new pairs are still in the courting stage and the older pairs got upset. Silly birds.