Developed for NASA, the Fisher Space Pen uses a pressured ink cartridge that allows for writing in a weightless environment and in extreme temperatures. The Fisher Space Pen accompanied Apollo astronauts in 1967 and is still used today in space and on earth by outdoor enthusiasts, search and rescue teams, and anyone else who requires the ability to write in less than ideal conditions. Exhibited by the Museum of Modern Art New York as an outstanding example of industrial design (and even spoofed on "Seinfeld"), this is a pen with an illustrious history.