Pens aren't exactly known for their longevity. A Bic that lasts a year usually seems like some sort of act of god. Well the ever-innovative people of Switzerland have developed a pen that, assuming you don't lose it, will last 7 years.
The Seven Year Pen is able to write 1.7 meters a day for seven years. Granted, this pen costs a bit more than your average pen (not much, only $7.50), but its long life will definitely save you some green and keep a few hundred pens out of the landfill.