'Cup that I Drink' in the Bible

But Jesus said to them, "Ye know not what ye are asking. Are ye able to drink the cup that I drink, or to be immersed with the immersion that I am immersed with?"

And they said to Him, "We are able." And Jesus said to them, "The cup that I drink ye shall drink; and the immersion with which I am immersed shall ye be immersed;