I had some of these as a kid and always thought they were great. They would be a good camping or car item. Thought i would share them plus tthey have a buy 4 get 4 free going right now
We had a similar product for warming our kids bottles when on the go... While they do work after 6-9 months of once a week use (at church) the little disk became very sensitive... Sometimes to the point of just moving the packet after boiling would cause it snap.
Just my two pesos...