How do I remove stains from plastic containers?

A little bleach in a cup of hot water and let it soak, Joyce.

Hot soapy water and some white vinegar, soak it for awhile , then rinse .

I have never been able to get that out, it seems to permanently stain the plastic. I was told that anything oily or sweet would do this when it is hot. The only ones I have had luck with cleaning is the old fashioned hard plastic ones that were mostly available when microwaves first came out. It seems to melt right into the plastic.

Joyce,. It's either bleach or vinegar, soak for a day, wash with dish liquid and let dry in the drain. Aloha!

Fill with white vinegar and set in the sun for a day or two. I won't use bleach, too toxic for items that I place food in.