Split into two teams of equal size
Line up each team on opposite sides of a table
Place an equal amount of drink in each cup
Set one plastic cup in front of each player, rim overhanging the table edge
On the start signal, the first player on each team drinks their cup
After finishing, place the cup back on the table edge upside down
Use one finger to flip the cup so it lands right-side up
Continue flipping until the cup lands upright
Once successful, the next teammate may start
Repeat until every player on the team has finished
The first team to have all players complete the sequence wins