Newspaper as Food-Container Deodorizer Stuff a balled-up piece of newspaper into a plastic container that has developed a funk, and let it sit overnight. By morning the paper will have absorbed the offending smell.
To make your own, you just need water, washing soda (note that you can also use baking soda) and hydrogen peroxide. Just mix equal parts of peroxide and washing soda with a double part of water. For instance, mix 1 cup of water with ½ cups each of washing soda and peroxide.