Fisher Space Pen Bullet

The Fisher Space Pen Bullet is the pen that went to the moon (literally — NASA uses them). The pressurized cartridge writes at any angle (including upside down), in extreme temperatures (-30°F to 250°F), underwater, and in zero gravity. The bullet design is genius: capped, it's the size of a lipstick. Post the cap on the back and it becomes a full-length pen. Chrome finish, stainless steel body, lifetime warranty. It's as much a fidget object as a writing instrument. The medium point writes smoothly with a pressurized flow that doesn't skip or blob. Refills are cheap and widely available. At under $25, it's the most reliable, compact pen you can carry. A piece of history in your pocket.