Packing light? The Stowaway offers the same great benefits and durability as a standard Space Pen does, all with an additional bonus feature: Compactness. With a barrel measuring just slightly larger than the ink cartridge carried inside, The Stowaway can easily be tucked away just about anywhere! This lightweight pen is the ideal choice for camping trips and other outdoor adventures where bag space can be limited. Stowaways are available in red, blue, or black nodized aluminum. They will write upside down, at any angle, under water, through grease, extreme temperatures (-30 to 250 degrees F), on almost any surface, three times longer than the average pen, and of course in the gravity free vacuum of space. Goes anywhere, writes everywhere.