Originally Posted by Gourmet Greg
I discovered the storing mushrooms in a brown paper bag independently but I'm sure many others have done the same for a long time. Who knows? Maybe they were originally sold that way before plastic. All I know is that they get slimy after only a couple days in the plastic container, but up to a week in a paper bag and still good enough for salads, up to two weeks if you're going to slice and saute them. Eventually they get dried and shriveled. I've wondered if they could be reconstituted in water sort of like you do with dried mushrooms, but never tried it.
When they get dry in my fridge, I use them in soup!