Flip cup (also known as Cups) is a team-based drinking game. It is similar to the drinking game boat race as a drinking relay race. Two teams stand on opposite sides of a table, facing one another (the person in front of a player is his/her opponent). In front of each teammate is a cup filled with an arbitrary amount of any kind of liquid (often beer). A player and her opponent both have the same amount of liquid. At the start of the race, the first member of each team drinks his or her beverage. When finished, the cup is placed "mouth up" at the edge of the table, and the person who drank it tries to flip it upside down, "mouth down", on the table. If he or she is not successful on the first try, the cup must be reset and re-flipped. Only after the first teammate is done flipping the cup successfully, can the next person proceed. Whichever team finishes drinking and flipping all its cups first is the winner.
