Look at this great Tootsie Warmer I won from Martie Hanna , A Hair in My Biscuit’s Etsy shop.  My Brother-in-law was visiting.  He was in terrible pain from a wrist injury.  I popped this in the microwave for a minute, he slipped his wrist in and got instant relief.Martie,  you might consider making these mitt-sized for hands.  He felt so much better.  Please check out Martie’s great shop.