If you’re still looking for that one-of-a-kind pen perhaps the Inka Pen is the one. It sounds like the perfect solution to today’s always on-the-go urban professional: lightweight, super-durable and it comes with a key-ring so you can just fasten it to whatever is most convenient for you.

The o-ring is watertight; unscrew it and out pops the ballpoint writing utensil so you can quickly jot down your thoughts. Turn it around and screw the pen portion into the container portion and now you’ve got a full-sized scribbler for taking down longer sentences. And if you’re always losing your PDA’s stylus the Inka comes equipped with one integrated into its base.

The pressurized ink cartridge means that your Inka will still keep on inking even at any temperature, any angle, any altitude and even in the water. If that’s not enough for you, if you manage to somehow break it Inka will replace it with another one since the pen comes with a lifetime warranty. The regular Inka Pen retails for $20 and there is a titanium version that will run you $50 while a refill cartridge goes for $4 a pop.

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