ive only found 2 more of course until today i havnt found any so now i got 5. i dont think ive ever thrown any in the steel because these are narrower than the steel ones ive seen. most of mine are c02 so no mess there, i buddy says the ones i get with chemicals in them they are harmless. anyway its about 2:00 this is my first break all day cept when i put the pics up, im gonna head back out and see how much i can make in a day just on extinguishers. thanks guys for the comments