I just made another tonight using a Plastic Folgers coffee container and 2” elbows for my quail. By far my favorite feeders.
I made a 2 gallon bucket with 2" elbows for my brooder. I introduce it at 2 weeks, so the chicks get used to using the elbows.
I use L brackets to secure my elbows. I use one bracket per elbow, for the chick feeder and two brackets for the bigger 3" elbows.