Ugh yeah those flukers corner bowls are horrible I unfortunately ended up with one when it came along with a corn that I rescued, and I ended up throwing it away because it was always so slimy and gross. I've found that, as nice as they are to look at, any of the "natural" looking stone ones are always more difficult to keep clean. I don't have any experience with those ceramic zilla ones, but I'm sure they're much easier to clean than the stone ones.

I've recently started switching over to the heavy plastic crock bowls from van ness and I love them. The ceramic ones are nice too, but they're a bit too heavy for me, plus with me being as clumsy as I am, I try to keep breakable things to a minimum