Space saving waterer...The waterer joints are sealed, Atmosphere pressure prevents the water from running out. The cap kinda acts simular as your thumb on the top of a straw. You have to hold it horizonal to fill. The keyhole system makes it easier to take it down than bungies, wire, etc.
This would work for feeder too, sized to hold inverted 5 gal water jug. Base is lifted to keep them from getting dirt in it. Outside in coop run area. Feeder / waterer on top of sturdy plywood & galvanized awning so can be accessed without entering run