The dish pans are great for several reasons.
1. If you have a hen like of mine who likes to kick out most of the straw the bottom is still bouncy enough eggs don't break!
2. Easily cleaned. One is missing in this pic because someone took a big dump in it and it was out being soaked and scrubbed clean. Most of the time I just shake out the old straw and dust then put them back.
3. Cheap, easily replaced for about $2 a piece.
4. I can sprinkle a little DE under the dishpans so any mites are fleas are dealt with but the hens aren't sitting directly in it.
Hope this helps someone design their nests.