Heat pack
Cut a section of old pantyhose leg. Tie off one end and fill with mixture of white uncooked rice and dried herbs(for scent). Peppermint, chamomile, and rosemary are my favorites). Tie off other end. When you need to use, just pop into microwave and nuke for 1 minute. Keeps warm for at leat 20 minutes. The scents also help to relieve tension with aromatherapy!