A cup can function biblically as a metaphor for the portion or destiny allotted to a person, including blessing, suffering, or divine judgment.
Jesus Praying in the Garden - Gustave Doré — New Testament
Historical and Cultural Background
Prophets describe nations drinking the cup of God's wrath, while Jesus speaks of the cup he must drink and prays concerning it in Gethsemane.
Historical Setting and Evidence
Culture:
Israelite, Judean/Jewish, Ancient Near Eastern
Period:
United Monarchy, Divided Monarchy, Roman / Second Temple Period
Evidence:
Well Attested
Interpretive Importance:
Major
Repeated biblical usage provides the principal evidence for the metaphor.