I agree, I also prefer silos for the same reason. I do use a plastic one though, it works for vertical bared cages though, not an option if you have grid or horizontal bars. The one in photo above should work with any type I would think.
Silos have a small cup at the bottom, it's narrow so they can't sit in it. This helps keep the water clean and allows for them to drink as they would out of a bowl.
If you should decide to go with silos, you can always use the little dish to put a couple of treats in, it sounds really cute. Otherwise watch and make sure they don't or can't sit in it and get wet, lol or worse contaminate the water supply. If there is no problems such as those that arise, it should be ok to continue for water use if you'd prefer.