Did you get it right?
Two modern serving-line details slipped into this 1950s school cafeteria.

The Answer
The correct answer is: the foam takeout clamshell and the modern calorie label strip.
Here is why
- A white foam takeout clamshell sits on the serving counter.
- A modern calorie label strip appears under the menu board.
Why people miss it
Both details are near food, so they do not jump out until you think about what belonged in a 1950s cafeteria.
What answer did you get before checking?