Blu Bottle Water Bottle Generates Its Own Water

So what next, a HHO powered car that refuels itself ?!

Hmmm... I think he has read "Dune" to many times.

Aw, c'mon, it's great ! You're stuck in a desert, and simply walking in circles for 200 miles can give you a thimble full of water - it could be a life saver. A gallon of sweat is nothing compared to a nice fresh thimble of water. The idiots waiting in the shade of their stranded vehicles would feel really stupid. It'd be a good idea to wash your socks in the radiator water before setting off, the rescuers wouldn't be impressed by a grubby appearance.

What are the realistic size constraints on a piezoelectric powered refrigerator?

Will the interface be anything like having your entire skin surface plastered with duct tape, for thimble-sized rewards?

Has anyone told the camels about this??

Piezo? Or induction coils?

If you shake one of those battery-less flashlights for a few minutes, you get enough juice to light up an LED weakly for a few minutes. That makes the self-filling water bottle seem unlikely...

Though I guess the amount of energy required depends on the dew point of the locality. It would work much better in cool, wet places. Of course, those places probably have plenty of water available anyway.