Pour Revi'it for Shabbat Kiddush

As on Jewish festivals, the minimum volume of kiddush beverage on which you may say Shabbat kiddush (or havdala) is a revi'it, as follows:
  • 4 fl. oz. (119 ml) for d'oraita cases such as Shabbat (or first-day Jewish festival) evening kiddush, and
  • 3.3 fl. oz. (99 ml) for d'rabanan cases such as kiddush for Shabbat lunch.