There is provided cooling goods during transportation. At least one transport container comprises at least one a storage container for storing goods, at least one dry ice container and at least one a fluid line capable of conducting sublimed dry ice discharged from the dry ice containers to the at least one storage container. The dry ice containers are replaceable battery packs. At least one expansion tank is connected to the container of liquidized CO2 for receiving discharged liquidized CO2 to the expansion tank. The expansion tank and the at least one fluid line are connected by a quick-release coupling.