Originally designed and prototyped in just 24 hours, this limited-edition pack's origin story is as unique as its feature set.

Engadget staffers spend the entire year poking, prodding and otherwise testing the latest tech gadgets. So we’ve got a pretty good handle on what’s unique and interesting right now. We put together ...

But packing one isn't always enough — you need to know where it is in your bag so you can access it quickly. To save yourself ...