Valuable object

Unclaimed Parcel

Details
Unclaimed parcel. Opening them may yield random materials.
Story
Due to various reasons, the recipient did not receive this parcel, and the sender did not retrieve it either. When selling these parcels, the Sky-Faring Commission scans them in advance to ensure that there are no dangerous goods (or excessively valuable items) inside.

"Mystery boxes like this are scams. Last time, I opened five boxes with expired mung bean sodas in a row..."
"How did this not get flagged as a dangerous item during the screening process!"