Portable Pen For All Environments: The Inka Pen

Inka Pen

Inka: A Waterproof Keychain-Sized Pen

The Inka Pen attaches to a keyring and has a lightweight, stainless steel design. Using a pressurized ink cartridge, it writes at any angle, temperature, altitude and even underwater. The pen is made in the U.S. and has a lifetime warranty. Available from Amazon for $11.


  1. PL says

    I find it odd to see this ridiculous product on a site which emphasizes efficiency. I was suckered into ordering one of these pens after seeing it raved about on another “gadget” site, and was sorely disappointed to learn that what seems like it SHOULD be a simple operation to go from “key ring thing” to “long pen” is actually a non-intuitive four-step process (eight steps, if you want to make it back into a key ring thing after using it as a pen). Pathetic.

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