Here's a hint that will help:
Have you ever put some food in your Tupperware only to find out it stained the inside of your bowl when you go to take it back out? Well here is a little hint that should help end this problem.
Mainly all foods with a tomato-based sauce are the culprit. So next time you are going to add something like this spray the whole inside of the container with a no-stick cooking spray first. It not only will help keep the food from sticking when you need to remove the food, but it will also help eliminate the stain problem as well.
pk
