Cops have begun an investigation into the delivery as what appeared to be human waste was found inside cans about to be filled with Coke.
Factory workers on the night shift at Lisburn's Coca Cola plant in Northern Ireland were left horrified when they made the discovery inside a number of cans on the production line.
"It was absolutely horrible, and the machines had to be turned off for about 15 hours to be cleaned," a source told the Belfast Telegraph.
"It was unusual because normally the cans come from somewhere else in the UK, but this time they apparently came from Germany."
Workers said they found something "pretty disgusting" in the cans after the tins arrived at the factory without tops on, to be filled with the fizzy drink before being sealed.
A spokesman for the Police Service of Northern Ireland said: "Detectives are investigating an incident at commercial premises in the Lisburn area following reports that a consignment of containers delivered to the premises had been contaminated."
The Food Standards Agency said it is aware of contamination and the incident is "subject to investigation".
A Coca Cola spokesperson told Daily Star Online: "We are aware of an incident involving empty cans at our plant in Knockmore Hill, Lisburn.
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"We are treating this matter extremely seriously and are conducting a thorough investigation in cooperation with the PSNI.
"The problem was identified immediately through our robust quality procedures and all of the product from the affected batch was immediately impounded and will not be sold.
"This is an isolated incident and does not affect any products currently on sale.”