Not Thermodynamically Intuitive

(I work at a very well-known coffee shop, and on this particular day, I’m working drive-thru. A car pulls up to the window, and I take the payment and chit-chat with the driver for a couple of seconds. He’s a nice, normal-seeming man, up until I hand out his drinks.)

Me: “All right, sir, here is your hot decaf black coffee, and here is your iced green tea latte!”

(He looks at the drinks, then turns back to me with a confused look on his face.)

Customer: “Which one is the hot coffee, and which one is the iced latte?”

Me: “…”

Customer: “…”

Me: “The… green one in the clear cup is the iced latte, sir. Have a nice day.”

(My faith in humanity dies a little more every time I have to tell someone how to tell the difference between a hot drink in a hot cup that feels very hot and an iced drink with visible ice in it in a cold cup that feels cold.)