Ironically, on a day when we read about the Wedding at Cana, I learned something new about Jesus and wine.
Not about His first public miracle with wine, mind you, but His last...
I learned that during the Passover meal, it is customary to have four glasses of wine. The fourth glass basically consummates the event.
Based on the actions at the Last Supper, and specific Passover traditions, it is believed that Jesus only had three glasses of wine at the Last Supper. (For example, he drinks a glass with the bread - typically the third glass of wine in the tradition. Then He tells his Apostles that He "will not drink again from the fruit of the vine until the Kingdom of God comes.")
He did not have the fourth glass, signaling the end of His Passover (and His sacrifice), until he sipped from that hyssop branch and finally declared "It is finished."