Inka Mobile.

• Position: COLORADO COOL STUFF

The Inka is a pen with "a pressurized ink cartridge so you can literally write upside-down," says Julie Hudetz of Nite Ize. "That did all right."

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Then iPads exploded and the company added a tablet-friendly stylus on the other end this January, and the resulting Inka Mobile took off. A newly redesigned Inka with translucent caps debuted in August.

"Now you can see what you get before you open it," says Hudetz.

Nite Ize has cultivated a nice mobile accessory catalog to complement its core business of lighting products. "It's all about...