I found a cool article today on making a bottle sized refrigerator that is powered with a USB cord.
Not the most practical contraption but it is interesting.
http://www.techradar.com/news/computing-components/peripherals/how-to-make-a-usb-mini-fridge-671278
Not the most practical contraption but it is interesting.
http://www.techradar.com/news/computing-components/peripherals/how-to-make-a-usb-mini-fridge-671278