Before containers, cargo moved as break bulk: sacks of coffee, crates of machinery, and barrels of liquid carried aboard piece by piece by longshoremen, wedged in with dunnage and dug out again at every port. Ships often spent more time at the dock than at sea, and theft was rampant. Early box ideas stayed local: James Brindley’s starvationer boats on the Bridgewater Canal carried ten coal containers in 1766, Benjamin Outram slid coal boxes from wagons onto barges around 1795, Benjamin Franklin Fitch built demountable truck bodies in Cincinnati, and the Golden Arrow train used luggage boxes between London and Paris. War forced scale. The US Army’s World War II transporter held 9,000 pounds and had lifting rings, the Korean War Connex box stacked three high, and by Vietnam hundreds of thousands of Connex boxes nearly halved overseas transit times.

In 1955 trucking owner Malcolm McLean decided shipping was really about moving cargo, not sailing ships. Engineer Keith Tantlinger designed his box and its twist lock, a conical pin that turns 90 degrees inside a corner casting like a deadbolt, letting cranes grab containers and lock stacks together. In April 1956 the converted tanker Ideal X carried 58 containers from Newark to Houston, and in 1963 Sea-Land released the twist lock patent royalty free. After a sizing war between Sea-Land’s 35 foot boxes, Matson’s 24 foot boxes, and European rail limits, the ISO settled on 20 and 40 foot lengths and the TEU. Waterfronts moved from Manhattan to Newark and from San Francisco to Oakland, and roughly 90% of non bulk cargo now travels in boxes.

• Only about 2 to 10% of arriving containers are physically inspected at some major European and West African ports.
• Smugglers have carved ivory into chocolate bar shapes and hidden drugs in perishable banana shipments.
• Estimates of containers lost overboard range from about 350 to 10,000 a year.
• In 2006 a spilled container washed thousands of bags of Doritos onto North Carolina beaches.
• Containers can carry invasive pests such as the khapra beetle, a destroyer of stored grain.