Containers are standardized units of cargo that can be easily transported by various means, such as ships, trains, and trucks. They are designed to be easily loaded and unloaded, and they can be stacked on top of each other, which makes them very efficient for transportation. Containers are typically made of steel and have a standard size and shape, which allows them to be easily handled and transported by specialized equipment. They are a key component of international trade and are used to transport a wide variety of goods, including consumer products, industrial equipment, and raw materials.