###Human: 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?, ### Assistant: Total drunk: 8.5 + 9.5 = 18 pints
18 pints * 2 = 36 cups
The two boys drank a total of 36 cups of liquid yesterday. 
 So the answer is :  36