I have used these cups for years. I've never had one break or chip. Amazon parrot bites do not break them. Never had one discolor. Wash in the top shelf of the dishwasher. You can see how full the cup is from across the room as well as what's in them. My birds dunk their pellets. I can easily tell when to give fresh water. I have a lot of them so I can use the dishwasher. Water cups especially. The water promotes the growth of pathogens. Work a little better to keep them clean & safe.
Reviewed by: Dorothy Dixon from Indiana on 1/30/2019