Jesus often referred to Himself as the Son of Man. He was glad to identify Himself with His children. And only because He is the Son of Man, are we able to be saved.
The cup Jesus was given was written about and Jesus also prayed to the Father in Gethsemane that it would be taken away. The cup given him to drink was filled with the wrath of God, and Jesus drank it in our place for He lived a sinless life here on earth.