Passover Seder involves drinking several cups of wine. From Wikipedia:
The Passover Seder (Hebrew: סֵדֶר [ˈsedeʁ], "order, arrangement"; Yiddish: Seyder) is a Jewish ritual feast that marks the beginning of the Jewish holiday of Passover. It is conducted on the evenings of the 14th day of Nisan in the Hebrew calendar, and on the 15th by traditionally observant Jews living outside Israel. This corresponds to late March or April in the Gregorian calendar. The Seder is a ritual performed by a community or by multiple generations of a family, involving a retelling of the story of the liberation of the Israelites from slavery in ancient Egypt. This story is in the Book of Exodus (Shemot) in the Hebrew Bible. The Seder itself is based on the Biblical verse commanding Jews to retell the story of the Exodus from Egypt: "You shall tell your child on that day, saying, 'It is because of what the LORD did for me when I came out of Egypt.'" (Exodus 13:8) Traditionally, families and friends gather in the evening to read the text of the Haggadah, an ancient work derived from the Mishnah (Pesahim 10). The Haggadah contains the narrative of the Israelite exodus from Egypt, special blessings and rituals, commentaries from the Talmud, and special Passover songs. Seder customs include drinking four cups of wine, eating matza, partaking of symbolic foods placed on the Passover Seder Plate, and reclining in celebration of freedom. The Seder is performed in much the same way by Jews all over the world.
The Four Cups
There is an obligation to drink four cups of wine during the Seder. The Mishnah says (Pes. 10:1) that even the poor are obliged to drink the four cups. Each cup is imbibed at a specific point in the Seder. The first is for Kiddush (קידוש), the second is for 'Maggid' (מגיד), the third is for Birkat Hamazon (ברכת המזון) and the fourth is for Hallel (הלל).
Passover Seder table
The Four Cups represent the four expressions of deliverance promised by God Exodus 6:6-7: "I will bring out," "I will deliver," "I will redeem," and "I will take."
The Vilna Gaon relates the Four Cups to four worlds: this world, the Messianic age, the world at the revival of the dead, and the world to come. The Maharal connects them to the four Matriarchs: Sarah, Rebeccah, Rachel, and Leah. (The three matzot, in turn, are connected to the three Patriarchs: Abraham, Isaac, and Jacob.) The Abarbanel relates the cups to the four historical redemptions of the Jewish people: the choosing of Abraham, the Exodus from Egypt, the survival of the Jewish people throughout the exile, and the fourth which will happen at the end of days. Therefore it is very important.
And then there is the phrase "My cup runneth over" from Psalms 23:5:
23:1 A Psalm of David. the Lord is my shepherd; I shall not want.
23:2 He maketh me to lie down in green pastures; He leadeth me beside the still waters.
23:3 He restoreth my soul; He guideth me in straight paths for His name's sake.
23:4 Yea, though I walk through the valley of the shadow of death, I will fear no evil, for Thou art with me; Thy rod and Thy staff, they comfort me.
23:5 Thou preparest a table before me in the presence of mine enemies; Thou hast anointed my head with oil; my cup runneth over.
23:6 Surely goodness and mercy shall follow me all the days of my life; and I shall dwell in the house of the Lord for ever.
Jesus' last Passover celebration begins. The emblem of the cup is already framed in the minds of the Jewish people to represent deliverance, among other things.
P.1938 - §3 After drinking the first cup of the Passover, it was the Jewish custom for the host to arise from the table and wash his hands. Later on in the meal and after the second cup, all of the guests likewise rose up and washed their hands. Since the apostles knew that their Master never observed these rites of ceremonial hand washing, they were very curious to know what he intended to do when, after they had partaken of this first cup, he arose from the table and silently made his way over to near the door, where the water pitchers, basins, and towels had been placed. And their curiosity grew into astonishment as they saw the Master remove his outer garment, gird himself with a towel, and begin to pour water into one of the foot basins. Imagine the amazement of these twelve men, who had so recently refused to wash one another's feet, and who had engaged in such unseemly disputes about positions of honor at the table, when they saw him make his way around the unoccupied end of the table to the lowest seat of the feast, where Simon Peter reclined, and, kneeling down in the attitude of a servant, make ready to wash Simon's feet. As the Master knelt, all twelve arose as one man to their feet; even the traitorous Judas so far forgot his infamy for a moment as to arise with his fellow apostles in this expression of surprise, respect, and utter amazement.
There stood Simon Peter, looking down into the upturned face of his Master. Jesus said nothing; it was not necessary that he should speak. His attitude plainly revealed that he was minded to wash Simon Peter's feet. Notwithstanding his frailties of the flesh, Peter loved the Master. This Galilean fisherman was the first human being wholeheartedly to believe in the divinity of Jesus and to make full and public confession of that belief. And Peter had never since really doubted the divine nature of the Master. Since Peter so revered and honored Jesus in his heart, it was not strange that his soul resented the thought of Jesus' kneeling there before him in the attitude of a menial servant and proposing to wash his feet as would a slave. When Peter presently collected his wits sufficiently to address the Master, he spoke the heart feelings of all his fellow apostles.
After a few moments of this great embarrassment, Peter said, "Master, do you really mean to wash my feet?" And then, looking up into Peter's face, Jesus said: "You may not fully understand what I am about to do, but hereafter you will know the meaning of all these things." Then Simon Peter, drawing a long breath, said, "Master, you shall never wash my feet!" And each of the apostles nodded their approval of Peter's firm declaration of refusal to allow Jesus thus to humble himself before them.
Jesus elevated the meaning of the cup to new and glorious heights never known before by people or angels
by saying, "This shall be the cup of my remembrance. This is the cup of the blessing of a new dispensation of grace and truth. This shall be to you the emblem of the bestowal and ministry of the divine Spirit of Truth."
It represents in symbol the bestowal and ministry of his Spirit of Truth.
All the best,