A bowl or any vessel that carries water can represent the uterus.
A mixing bowl represents the bowel because it is a pun on bowel and also because food stuffs are mixed in it. The foods being mixed in the bowl are indicative of foods you are being asked to eliminate from your diet.
A toilet bowl can indicate elimination. If, however, there are food items blocking the toilet bowl or visible in it, you are being asked to eliminate these food items from your diet. For example, a milk carton blocking the toilet would indicate the need to eliminate dairy products from your diet.
A cracked toilet bowl warns of potential damage to your bowel. Again look for food items being specifically referenced or symbolized using color and eliminate them from your diet.