Finally a hand warmer that I don't throw away

I received 2 as a gift from my bestie and at first I was sceptical because the packaging isn't fancy and several products that claim to be reusable turn out to be a cash grab. My stepson doubted their claim also so the other weekend we tested them.
They are just the right size for in a jacket pocket or my work gloves and they warmed up fairly quickly. They get solid as they heat up and if you don't fiddle with them as they are working they can become kind of a bulky mass. The best thing is that when you are finished with them you can throw them in a pot of boiling water for a few minutes and they return to their original state ready to go again.
I put them in my "Emergency Kit" that goes in whichever vehicle I use now IF I do have a break down or something I know I will have some protection from the cold. I also recommend them to help alleviate sore muscles, they provide just enough warmth to relax aches and pains.