Yep, that's a brass canister extinguisher, filled with Carbon Tet. It'd carcinogenic, but it also makes some if the best thread tapping lubricant that's ever been invented. Drain the canister and store the liquid in a tightly capped mason jar. Just have plenty of ventilation if you use it as a thread tapping lube.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!