I actually had to show them the label on the bottle that says '2 Liters'.
'I want pepperoni, ham, Canadian bacon, mushrooms, sausage, onions, jalapenos, hamburger, bell pepper, extra cheese, olives, pepperoni, and Canadian bacon. Two dozen Buffalo wings, cheese sticks, and a twelve pack of Pepsi.'
'Okay, that'll be $42.47. Is this cash, check or charge?'
'WAAAIITAMINUTE!!! THIS SAYS $9.99!!!!'