Is drinking the non-alcoholic "Anbari" beverage offered by the People of the Book considered unlawful (haram), what is its ruling, and what is its expiation?

There is no harm in drinking this beverage if it is not intoxicating. However, if it is originally intoxicating, then it is forbidden to drink it, even if intoxication does not occur. The permissibility of eating the food of the People of the Book—as long as it is not intoxicating, impure, or carrion—is indicated by the fact that the Prophet, peace and blessings be upon him, ate the food of the Jews. The ingredients of this beverage should be verified.