Some plastic food containers develop orange stains after repeatedly storing red sauces, chilis, and other foods. Set them out in the sun for a while (some containers need more time than others) and the color will just disappear. Try it, it’s hard to believe but it works! To avoid staining in the first place try spraying the container lightly with Pam before adding ravioli, chili, etc. It’s also best not to reheat leftovers in plastic containers for staining reasons but also because I’ve heard that heating the plastic can release harmful chemicals into the food.
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