I have about 100 or more of the 6" ceramic dog bowls... I have cleaned out 6 Dollar Tree locations around me.
They are foo foo, and have cutsie doggie designs on them, but they were a buck each, and my snakes never complain.
They had these a couple of years go, then didn't any longer. Each location in my area got new shipments recently so I ran around and cleaned them all out.
They are heavy, and only get knocked over every once in a great while, do not generate mold underneath, and are large enough to keep the humidity up.