After reading an article about the problems of microwaved plastic, we made the change to glass containers. I've found that we no longer have an issue with lingering odors like garlic or other strong smelling foods. The 2 cup size is perfect for the freezer too. I want to get the 4 cup size as well. I have always love my Pyrex glassware. Durability is an important fact to me. Some of my Pyrex baking pans are well over 20 years old.