If all the Tupperware you own is tinged with red, you need to know how to remove tomato sauce stains from plastic. There's nothing more frustrating that scrubbing, and scrubbing, and scrubbing to no avail. And while you can't make tomatoes less acidic, you can make your own stain-fighting baking soda cleaning solution to get rid of old stains and prevent new ones from forming.
One solution to the problem is to stop eating pasta with red sauce, or at least to stop having leftovers. But pasta is such an easy meal to make when you're short on time that we doubt that will ever happen in your household. Instead of resigning yourself to a life with stained Tupperware (we've been there before!), whip up a thick paste of baking soda and water. Cover your plastic container with the mixture and give it a good scrub. Your Tupperware will look like new in a matter of minutes.
A more drastic method for removing tomato sauce stains from plastic is to use bleach. Soak your Tupperware overnight in a sink full of water and a few drops of bleach (roughly one tablespoon of bleach for every cup of water) or a bleach-based kitchen cleaner. You should really only use this method on high-quality containers, which means it's time to cut your losses if you're trying to get rid of tomato sauce stains on old takeout containers.
But let's say none of these above methods work and you're not ready to give up just yet. What can you do? One surprising technique for cleaning tomato sauce stains is to use the power of sunlight — yes, really. Simply wash your Tupperware like normal and then lit it sit somewhere in direct sunlight. Over time, the sun will cause the tomato sauce stain to fade.
Now that you're a cleaning expert, you'll never have to worry about tomato sauce stains on your Tupperware again. So, let's get back to more important things, like eating spaghetti bolognese.