My Cup Runneth Over With Confusion

Customer: “I’d like three vanilla soft serve, please.”

Me: “Sure thing. Would you like that in a cup or a cone?”

Customer: “What’s the difference?”

Me: “One is in a cup, and one is in a cone.”

Customer: “Oh, okay. I’ll have them in cups.”

(I make the soft serve, put them in cups and hand them to the customer.)

Customer: “This isn’t what I wanted. They’re in plastic cups.”

Me: “I thought you said you wanted them in cups.”

Customer: “By cup, I thought you meant, like… a cup cone. Some kind of cone in the shape of a cup!”