Utopian Bowls are the cutest, most practical bowls we've seen for your little dog! They're made of FDA-approved plastic with a non-skid rubber base. Utopian Bowls have a weighted base so they don't tip over, and they're dishwasher safe! The interior of the bowl measures 4 inches in diameter and 1 3/4 inches high. The exterior is 4 3/4 inches in diameter at the bottom and is 2 inches high.