'Cup' in the Bible

For whosoever shall give you a cup of water to drink in my name, because ye are Christ's, verily I say unto you, he shall in no wise lose his reward.

And Jesus said to them, Ye do not know what ye ask. Are ye able to drink the cup which I drink, or be baptised with the baptism that I am baptised with?

And they said to him, We are able. And Jesus said to them, The cup that I drink ye will drink and with the baptism that I am baptised with ye will be baptised,

And having taken the cup, when he had given thanks, he gave it to them, and they all drank out of it.

And he said, Abba, Father, all things are possible to thee: take away this cup from me; but not what I will, but what thou wilt.