I make popcorn bags especially appreciated by anyone who has pain! You sew a square small pillow sized flannel and fill it up with regular popcorn (unpopped) not the microwaveable kind just the kind in a plastic bag. Sew it up. You can throw it in the microwave for 2-3 minutes to get it hot and it acts like a bumpy heating pad...and you can use it forever! That is unless you cook it for so long the popcorn actually pops!