'Cup' in the Bible

I tell all of you with certainty, whoever gives you a cup of water to drink because you belong to the Messiah will never lose his reward."

But Jesus told them, "You don't realize what you're asking. Can you drink from the cup that I'm going to drink from or be baptized with the baptism with which I'm going to be baptized?"

Jesus told them, "You will drink from the cup that I'm going to drink and be baptized with the baptism with which I'm going to be baptized. But it's not up to me to grant you a seat at my right or my left. Those positions have already been prepared for others."

Then he took a cup, gave thanks, and gave it to them, and they all drank from it.

He kept repeating, "Abba! Father! All things are possible for you. Take this cup away from me. Yet not what I want but what you want."