Good pens are hard to come by in my purse....well any pen actually. The Inka Pen looks to be a sturdy, well designed pen that I would make good use of on a day's worth of errands. The ability to take notes to supplement my memory is crucial, as is a pen that attaches to my keys (which I might add, I have never lost!). That alone might ensure that a reliable pen is always within reach. The Inka is engineered for extreme environments (like mountain climbing and department store tag sales) so durability is a given. It expands from a quick use pen to a full sized writing instrument and has a nifty PDA stylus too. The ring attaches to items like jackets and backpacks or can be used as a keyring. With available refills and a lifetime warranty this might be the first pen that stays with me for the long haul.

$25 at Inka Pen website