20' Container

Prototype Information

The 20-foot container, or TEU (Twenty-foot Equivalent Unit), started changing the shipping industry in 1956 when Malcolm McLean, a former trucker turned entrepreneur, loaded 58 metal containers onto the Ideal X, a converted oil tanker. Instead of unloading cargo piece by piece, dockworkers could now lift entire containers straight onto ships, slashing port time and costs.

McLean’s idea caught on fast. By the late 1960s, international regulators formalized the 20-foot container as part of the ISO 668 standard. That move locked in its dimensions and made it the core unit for global intermodal transport. Ports, trucks, trains, and ships across the world adjusted to handle it, setting the stage for the modern shipping network.

Even as 40-foot containers gained ground in the 1970s and 1980s for carrying larger volumes, the 20-footer held its place. It handles dense, heavy cargo better and works well in places where space is tight or infrastructure is limited. Shippers still rely on it today for everything from machinery to bulk commodities.

The 20-foot container didn’t just move goods—it reshaped global trade. It created a language for shipping efficiency, and even now, it remains a standard measure of cargo capacity and a key tool in global logistics.