As seen on Shark Tank, the Fizzics Waytap beer dispenser takes any standard can or bottle of beer, agitates it with sound waves, and dispenses it with just the right amount of “micro-foam” that it will taste just like it came from the tap. There are no gasses or chemicals at work here; just sound waves powered by AA…
Source: LifeHacker – Save on the Fizzics Waytap, And Turn Any Beer Into a Draft Beer with Sound Waves