Before putting tomato sauce or other leftovers that may say stain into tupperware, line the container with foil.
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I would use waxed paper instead of foil. Tomatoes are acidic and might cause a chemical reaction with the foil.
Might cooking spray also help, if you are not going to store it overnight, but use it all during the meal?
both of the other posts are my concerns and ideas! :)
As a prep chef and someone that just has this phobia about covering any tomato or cheese type foods/casseroles, etc... The foil and the natural acids in the tomatoes and cheeses cause a reaction.
Isn't it just easier to rinse bowl with cold water and make sure the food is cool when you put it in? plastic is poress. so when food is warm.it opens the pores causing stains...to remove stains use baking soda paste..OR a little bit of bleach mixed with warm water, sometimes just putting bowl in the sun for a day will help.
I used to sell Tupperware many years ago, and still buy and use it all the time for everything. The best way I have found is to make a paste mixture of Vinegar and baking soda, then coat the inside of the bowl, allow it to sit for a few minutes to do its thing, then just rinse and wash as you normally would. I still have bowls that are over 25yrs old, and there are no stains of any kind in any of them at all.
You folks frighten me. With all the information out there both about the toxins in cooking sprays and the dangers of plastic toxins leaching into food when anything is hot in plastic, I would put neither hot food nor cooking spray on plastic containers.
I use the 1 gallon food storage bags (no zippers, etc.) and line the container with the bag. Place the food in the bag and freeze. Once frozen, remove from the container, put in a heavier bag and now your container is free and your bagged food can stack.
All of these are excellent tips, however, after tomato sauce ( from a can ) is exposed to the air, it should not come into contact with metals such as tinfoil. The acidity in the tomatoes when mixed with metals will cause your sauce or any canned tomato product to turn black. I learned this the hard way many many years ago..
Another thing that causes staining is the microwave. Any oil put on plastic such as Tupperware and used in the microwave will cook the plastic and the stain will be permanent.
Bad idea!! Acid in tomatoes (sauce) will cause aluminum foil to disintegrate!
I use plastic wrap to line my containers and prevent tomato products from staining. Better than foil, plastic wrap is microwaveable.
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