I place mine up off the ground so they don't throw debris in it. I have 2 bricks with a stepping stone on top to sit my five gallon plastic waterer on.Works great.I tried hanging ones before and they kept swinging it and all the water got throwed out.
I started out with mine on the ground . . . it got nasty within minutes, it seemed. So I installed a hook and hung it. That lasted a couple months, but now they've learned to tip it over and drain all the water out. So I guess I will have to put a cement block under it to keep it steady so they can't tip it over. But the little rascals will figure out some other way to mess it up!
I like the hanging as well for both food and water. For me they stay a lot cleaner and it gives the birds a little more floor space. When it's very hot, they like to lay under the waterers and I find I don't have food wastage......they peck at any that may fall out. The cups look neat, I would probably like those as well but the ones I have are fine.