Originally posted by slip2rock
I've had a couple of those pen's. They're called "the fisher space pen". About £15, ish, come in a neat little black plastic case.
They're about the size of a bic, slide in to themselves to about half size and look like silver suppositeries. They'll write through oil, upside down, in a vacum, 30 degrees below zero and are virtually indestructible.
I've lost both of them.... DOH!