I popped into the Army Navy Surplus the other day, looking for small stuff sacks. I found a couple bags that were just what I wanted. I also found this mysterious pouch, for $2.99:
Inside was a chemical heating pad. Just two tablespoons of water has this thing cooking! Like, almost too hot to touch. Wrapped in a towel, it’s keeping my achy hip nice and warm on its test run. I don’t know what’s in it – feels like sand and small marbles – but I’m curious how long it will stay warm. Not sure how it’s intended to be used, but I think I’ll put it in our camping box for emergencies.