A container 1 is a container cargo to transport sea or river, land transportation and multimodal transportation. These are watertight units that protect the goods from the weather and are made by International Organization for Standardization (ISO), namely, ISO-668; 2 for the same reason, are called ISO containers. Containers can be used to transport bulky or heavy objects: engines, machinery, small vehicles, etc., or palletized merchandise. Less frequent are those carrying bulk cargo. The dimensions of the container are standardized for ease of handling. Normally they measure between 2 and 5 meters. There are different types of containers like "Dry Container, Reefer Container, Tank Container, Isolated Container, Dry Van, Reefer, high cube, open side, flexitank, Metallic, Open Top Container, etc. There are different sizes for containers varying in length and height. The most used worldwide are the 20 and 40-foot large equipment, with an internal volume of approximately 32.6 m³ and 66.7 m³ respectively.