Here is another mini kegerator for your home that lets you serve beer conveniently at your parties. The Green House Beer Dispenser serves your drink with foam. It weighs only 3.84lbs, so you can easily carry it around. To use it, simply press the switch, insert into the beverage, and you are set. It has an ultrasonic vibration micro foamer built-in.
You can power this device with 2 x AAA batteries. It can work with lagers, beers, stouts, and everything in between. More info is available here.