The Fisher Bullet Spacepen "Goes Anywhere, Writes Everywhere."
Fisher Space Pen | Bullet | Purple Passion

The thing that makes the Bullet Space Pen by the Fisher company so special, is the fact that it works under various extraordinary circumstances. It is originally designed to write with in space, which is possible because of the pressurized refill. But you can also use the Bullet Spacepen under extreme weather conditions and even underwater.

This Spacepen has a shiny purple color and a retractable clip.