"It was unusual because normally the cans come from somewhere else in the UK, but his time they apparently came from Germany."
A spokeswoman for Coca Cola told the Belfast Telegraph that the issue was identified "immediately" and that an investigation is now underway:
"At Coca-Cola, we take the safety and quality of our products extremely seriously. We are aware of an incident involving empty cans at our plant in Knockmore Hill, Lisburn. We are treating this matter extremely seriously and are conducting a thorough investigation in co-operation with the Police Service of Northern Ireland (PSNI)."
The soft drink giant also added this was a one-off incident, the cans in question never left the factory and that it "does not affect any products currently on sale" in Australia.
Meanwhile, the phantom pooper has yet to be identified.