Toyota’s newest line of Priuses includes a solar powered fan system that is designed to keep the car’s cabin cooler by constantly circulating in fresh air, all the while reducing the amount of A/C required upon entry into the vehicle.  But now you can have that same features in any car of your choosing thanks to the Auto Cool Air Vent.  Much like the Prius system it uses a set of solar panels to power a small fan and suck out the hot, stale air and suck in the cool fresh air.  It fits open any window, just open it ajar.  Better yet it includes a free cup holder organizer and costs just $7.