Free Speakers With Purchase Of Shoes?

While shopping at EMS this past weekend for hiking shoes the cashier told me that my new Keens came with free cardboard speakers.  At first I gave him a confused look, then accepted said speakers figuring I'd be depositing them in the nearest trash receptacle.  Turns out I was too quick to judge, they're actually pretty cool.

Keen's "Fold and Play Recycled Speakers" form 2 speaker cubes that don't require a power source and plug into any headphone jack.  The sound quality is decent considering the source and volume output is sufficient at my office desk.  Kudos to you Keen.