A set of 3 Guinness beer servers and glasses. Includes a foaming function. - Number of glasses: 3 2 commemorative glasses, 1 regular Guinness glass - Brand: Guinness - Server type: Beer server - Function: Beer foaming function - Power source: AC adapter Place the glass on top of the surger and it will foam with ultrasound. It creates the perfect amount of foam. Operation has been confirmed, but foaming could not be tested as there was no Guinness beer. The "beep" sound has been confirmed. It was working when it was last used. The commemorative glasses are one-of-a-kind, so it's first come, first served. Thank you for looking.