Rice Heating Pads. Great tutorial and materials list. 2 sizes... perfect for neck or for lap/back. I've made similar heating pads, but I like the divided sections on these pads. They probably form to the body better. I'll try it!
plant. eat. create.: How To Holidays: Make a Rice Heating Pad
Easy No-Sew Rice Heating Pad -- making this homemade microwavable rice heating pad took less than 5 minutes start to finish. Perfect for soothing sore muscles or warming up from the cold, especially when you add a few drops of essential oil! | via @unsophisticook on unsophisticook.com
How to make Rice Heating Pads Tutorial heat pack microwave heating pad » Hemp Microwave Heating Pad