it's waterproof, and would not stick on cup. black and white bathroom ideas classic bathroom black and white great blending of an older feel with modern touches love shower floor bathroom spaces bathroom modern bathroom black white bathroom idea. :) did i mention that these bibs are completely waterproof and machine washable? they each run about once every half-hour, so there is rarely a period of twenty minutes when something is not going to budapest. if preschool is the first time you are apart, it will be hard for both of you! too much distance is too much to explain. 