If you thought the foamy head on a beer was an unfortunate side effect of a poorly poured brew, the makers of the Sonic Foamer ($40) have a little lesson for you. With one press of the button, this device quickly bubble-charges your beer, which apparently improves the flavor of it thanks to the aromatic bubbles popping up into your nose. You’ll need six AA batteries and two teaspoons of water on the Sonic Foamer’s tray, then just put your glass on top and watch the show. Oh, you’ll also need beer, but you probably have that.