Jewish Festivals: Kiddush: Drinking Cheekful

As on Shabbat, the minimum total volume of Jewish festival kiddush beverage that must be drunk--usually by the kiddush-maker (mevareich) but it may even be several people combined--is a cheekful (m'lo lugmov)—considered to be 2 fl. oz. (59 ml) within 30 seconds.
Note If no one drinks the kiddush beverage, the commandment to say or hear kiddush has not been fulfilled. 
Note Although you must drink at least a cheekful to fulfill kiddush, you must drink at least 4 fl. oz. (119 ml) within 30 seconds in order to say the after-blessing.