The Solar Ad Charger. In Brazil, they put this in a magazine ad for Nivea sunblock so the Ipamema Girl could let the ad soak up some rays and then she could use that little USB port thingie in the ad to load the energy into her smartphone.
The secondary message was: See? The sun is powerful enough to power a phone--so use sunblock.
I think I would be so freaked out over wearing a bikini and linking my phone to a big screaming hot star I might forget the sunblock.
Talk about an interactive ad!
Also--if this panel is so cheap they can put it in a magazine, it will be showing up lots of places.