I built this feeder out of a 90mm PVC drain pipe, a Y bend (I think it's called that) and a cap on the bottom.
I make different feeders like this to suit different spots in the coop. It is cheap and easy to make.
This one has a 45 degree angle with a diagonally cut pipe on the end of the Y. This helps keep it dry if it is out in the rain and helps stop too much food being scraped out. It also has a screw on thing at the top where a cap can screw on if it is left in the rain.
This one has a bend on the top that sticks through the wire so I can fill it up through the wire.