I had never heard of such a thing, nor would have thought of it!!!
I LOVE popcorn. I even love the smell of it popping! I pop it often as I consider it a low calorie snack and the salt satisfies my taste buds. Ha! I pop it the old fashioned way, no microwave, no pre-popped bags. Whatever is left over in the big bowl, we stick in the oven. That acts as a huge lid. Haha. The next day it is still good, but by the next day it is a bit stale.
I read an article that said to freeze the left over popcorn. That was the craziest thing I ever heard!! The article said that it was not actually frozen and that it retained its freshness and even the taste. The article said that some even liked it better frozen than to eat it right away. This would not work for me as I like it best when it is warm. They also claim that it does not stick in your teeth as much.
Well, I try about everything. I placed the left over popcorn in a gallon freezer baggie and put it in the freezer. We were absolutely amazed!!! It was so crisp and flavorful it was unbelievable. I will always freeze my left over popcorn.
Do not be afraid to try new things.