Good to remember. I don't have one in the shop and the one in the house is I am sure dead. Thanks for the post. I was welding in the shop many years ago and I moved the plastic gas can away from where I was going to be welding and thought everything was fine. the problem was I put it in the way of my friend I was welding for and he put it back. I was welding and noticed my left leg was getting hot and found the gas can with a hole in the side about the size of a hen egg,with fire shooting out on my leg. I guess I got excited because I grabbed it an through it out of the shop, under my friends ton truck. I ran to get the extinguisher and left my friend to fight for his truck. He had it mostly out by the time I got back with a dead extinguisher that only went poof. Remember a dead extinguisher is worse than none at all, with none you don't waste time on something that does not work. If he had waited for the extinguisher his truck would have likely been toast or at least toasted.