US Customs and Border Protection (CBP) in the Ohio city of Cincinnati say it received a special type of frosted cereal last week - cocaine-covered cornflakes.
The substance had been shipped from South America to a private residence in Hong Kong, and had a street value of over US$2.8 million.
CBP narcotic detector dog Bico was working incoming freight from Peru when he sniffed out 20kg of the substance last Saturday (US time).
When officers opened the box to take a closer look, they saw the cereal contained white powder, and the flakes were coated with a greyish substance.
CBP officers tested the substance and found they contained cocaine.
Cincinnati Port director Richard Gillespie says drug smugglers will hide illegal substances in anything imaginable.
"The men and women at the Port of Cincinnati are committed to stopping the flow of dangerous drugs," he warns.
"And they continue to use their training, intuition and strategic skills to prevent these kinds of illegitimate shipments from reaching the public."
In February 2019, 12kg of cocaine-stuffed bananas were mistakenly shipped to a grocery store in British Columbia.
Had the boxes been delivered to the right place, it would have flooded the drug market with 800,000 doses of cocaine.