Reefer containers are suitable for transporting goods in a temperature-controlled condition. Temperature settings range from minus 20 to plus 20 degrees Celsius. Drains can be opened or closed for condensation discharge. This depends on the goods. Reefers are being used for transporting anything from frozen goods (For example french fries) to chilled cargo (for example chocolate). Recorders that measure and register the temperature at set times can be included in the container for certain goods that are sensitive to fluctuations in temperature.