Instruct: Classify a given review into positive or negative sentiment.
Query: Not microwave safe

I got these because I like KitchenAid products. They are sturdy and heavy plastic. It never occurred to me that they were not microwave safe. They are so NOT. Three minutes and a hole in the bottom of the small bowl. There should be a warning on the bottom of the bowls that alerts you to NOT put these in the microwave.