Did you get it right?
One modern disposable item appears among reusable 1950s picnic supplies.

The Answer
The correct answer is: the disposable wet-wipe packet.
Here is why
- The plates, cups, thermoses, utensils, lantern, basket, and cloth napkins are reusable period items.
- A white wet-wipe packet with a molded peel-back seal lies near the center foreground.
- That packet is the only modern disposable mismatch.
Why people miss it
Its white wrapper resembles a folded napkin until the raised plastic seal is noticed.
What answer did you get before checking?