Fill a mens white cotton sock with two cups of white rice. Tie a knot in the top. Place in microwave for one minute. You now have made a flexible heat wrap. After several uses it will smell like popcorn…time to wash the sock and make a new one. I have also used smaller white cotton sock to make a heat wrap for children..heat for only 30 seconds. Good for ear aches, tummy aches etc. Decorate with magic marker…….they love them.