Extreme Pen — Works underwater, atop Mount Everest or in outer space

From the website:

Write Anywhere Pen

Ideal for situations ranging from outdoor adventures to underwater expeditions to everyday office use, this pen writes at any angle, temperature and altitude.

It can even be used underwater or in zero gravity.

Unlike lesser pens which claim to be titanium but are in fact merely titanium-plated, the barrel of this pen is machined from solid aerospace-grade titanium; additional components are crafted from carbon fiber, a strong, lightweight composite often used in aircraft and bicycle construction.

It easily converts from a compact size for quick notes to a full-size pen for more extended use, and includes an integrated PDA stylus attachment for digital note taking and a split–ring for securely attaching the pen to keys, clothing or gear.

The replaceable pressurized–ink cartridge has a write–out length of nearly 2000'.

3"L (5" extended) x 5/8" Diam.

Weight: 0.5 oz.

$89.95.