Did you get it right?
Two modern packaging details slipped into this old ice-cream parlor.

The Answer
The correct answer is: the breakaway tamper ring beneath the syrup cap and the heat-sealed plastic sleeve around a cone.
Here is why
- The strawberry syrup bottle has a separate red breakaway tamper ring below its cap.
- One waffle cone is enclosed in a clear heat-sealed plastic sleeve.
Why people miss it
Both modern plastics are small and match the colors of ordinary counter supplies.
What answer did you get before checking?