This beer foam maker can generate softer, richer creamy foam by ultrasonic vibration (40000 times per second). The principle of ultrasonic vibration is to make the carbon dioxide in beer release into ultrafine particle, thus, make the foam like milkshake and taste more exquisite and mellow. Pull and push rod can control beer dispensing, push forward to dispense beer foam. This good taste is just like fresh-make green beer. As we all know, green beer has gained much more popularity.