i have tried a few different varieties - all relatively inexpensive. i have seen/bought them at target, home depot, and other similar type stores.
the first one i bought was stainless steel, and i found it terrible to try to clean. at that point, i was marinating the veggies in salad dressing, so that might have been part of the problem.
the most recent one that i got was this one (or something similar):
the two things i like about this one is that it is non-stick, so relatively easy to clean. also, because it is round, there are no cracks/crevices for things to get stuck to.
not everyone likes non-stick, so this might not be good for everyone. i have not had any issues with the coating on the inside of the bowl scratching, but the bottom does tend to scratch off - no food on that surface, so it doesn't concern me too much.