How can a nozir fulfill the mitzvah of drinking four cups of wine at the passover seder? p.s. It is not a riddle. My son asked me this question, and I don't know what to answer him.
The Minhag is to fill up an additional cup towards the end of the seder known as Kos Shel Eliyahu. I was just wondering what the various minhagim are as to what to do with it after the seder is over.