From the 1964 Mississippi Voters' Literacy Test, reputedly drawn up with input from the Rev. Killen:
Q. From what vessel does one drink coffee?
Watch the movie "The Grapes of Wrath" again. When they go into the diner to get bread and candy for the kids look on the wall behind the waitress. There is a sign offering a cup of coffee for 10¢ and a saucer of coffee for 5¢.