Getting Rid of Odors
Grab some baking soda
Dissolve four tablespoon of it into one quart of warm water.
Immerse your containers in the baking soda solution if its a small one or pour it into the container if it is a large one. Soak containers about 30 minutes or until the odor is gone. Rinse and dry.
Didn't get rid of the odor?
Crumple up a newspaper and stuff it in the container. Put the lid on securely. After a day or two, remove the paper. it should have absorbed the odors. Just wash the container and lid in some hot, soapy water, and wipe it dry.
Zap Those Stains
Grab some chlorine bleach
Pour one tablespoon of the bleak per cup of warm water. Make sure there is enough to cover the discolored part of the container when you pour it in.
Pour it in
Pour the bleach solution into the container. If you also have a stained lid, put it flat at the bottom of the sink and pour on more of the mixture. Soak of about thirty minutes or until clean.
Finish by washing your container and lid in hot, soapy water. Wipe dry and store.
To cut down on staining, spray containers and lids with non-stick cooking spray before using them with tomato-based foods.
And be sure to check whether containers are microwave-safe before heating them. This is because plastic can degrade in the microwave, which makes them more likely to stain and retain odors.