Deffinately would not want to use clay pots. I have a shield that is made from saucers that go on the bottoms of the flower posts. Plastic of course. All you need is 7 to 9 bottoms, three sections of thread rod, and a whole bunch of nuts and washers. Mine works fairly well. Especially if you put a fan in it. Mine has a double roof on it to keep rain water out of the fan.