Elijah drank 8.5 pints of coffee yesterday. Emilio drank 9.5 pints of water yesterday. How many cups of liquid did the two boys drink yesterday?
Total drunk: 8.5 + 9.5 = <<8.5+9.5=18>>18 pints
18 pints * 2 = <<18*2=36>>36 cups
The two boys drank a total of 36 cups of liquid yesterday.
#### 36