Best idea yet, tbh. Since they're flexible they probably don't upturn as frequently, either, when the chickens step on the sides. I wish they were a bit longer, but it's a good place to start looking.
Currently we use a few chick feeders (like first pic, but no top) and a few round feeders (the bottom part of something like the second pic here, not the top part since we do fermented feed) to feed our flock, which is okay but still doesn't give enough perimeter space for everyone.
I'd like...