Mine does have a few little dark spots on the bottom, but I put these through the dishwasher so I know that they are clean and sanitary. Here is the popware website. They have the small bowls and give pretty accurate descriptions. My small set stands about 3 1/2 inches when the legs are up. You could use them with the bowls closed in and legs in, then it stands about 1/2". I notice that they have a more expensive version that goes from 2.75" to 12".
Popware for Pets?