Just recieved a couple Zippo hand warmers I ordered after reading this, I am trying one out right now and having it laying on my chest. Works very well. They seem very well made. I ordered the Zippo hand warmer fluid with it as they said it doesn't stink like lighter fluid. I don't really notice an odor unless I stick my nose up to it. Until I compare it to regular lighter fluid I can't tell if it is better or not. Pretty cool to rediscover some old time technology. Thanks to the OP. I forgot stuff like this existed.