SCP 059040950: The Box

 The Box
SCP 059040950
Seeking Greenlights:  Yes
Level 2
Object Class:  Euclid
Elevator Pitch:  Package from Amazon keeps getting ordered and never delivered.  People die during every step of the delivery process.  The most captivating part:  Nobody knows what's inside it, the contents are anyone's guess.
Central Narrative:  An unopenable, continuously recycled cardboard shipping container.  Hundreds of individuals order items from Amazon, and the Fulfillment Center ships this box out by mistake.  The label changes by itself, its weight varying between 35 kilograms to 20 pounds.  Porch pirates who attempt to steal and open the package die from mysterious causes, and the container is always found in brand new condition, with the flaps perfectly sealed.  A series of unlikely Rube Goldberg-esque situations conduct the package all the way back to the Warehouse, sometimes from the other side of the world.  Delivery drivers meet with accidents when the container is onboard their vehicle, ranging from a flat tire to rolling off the side of a mountain in a sudden rainstorm.  The package never gets delivered, somehow always finding its way back to the Fulfillment Center.
Special Containment Procedures: Create simulation Fulfillment Center with a security door.