Does you Tupperware, Rubbermaid or what ever type of plasticwear you use easily stain? I have a problem when I store tomato based items, especially Spaghetti Sauce. There are products on the market such as Cascade Plastic Booster, but using those products add up. I tried lightly spraying the container with cooking spray before I added my leftover spaghetti. Worked like a charm. My Spaghetti slid right out of the container and there were no stain!