Cashier: Actually, the only size we have is the large for $.price.
This happened to me at the mall food court. The small was $1.29, which already struck me as a bit steep, and the large was $1.59 and no way I was paying that much for a freaking drink.
Since soda is almost all profit, I wonder how much money they make by running out, or "running out", of small cups. If they screwed up and didn't order enough, shouldn't they offer to give people a large at the small price, or a large filled partway at the small price? Or is it perfectly reasonable to say "Actually, this is your only option today"?