refrigerator car: a freight car that is equipped with refrigeration system
container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another)
gypsy: a member of a people with dark skin and hair who speak Romany and who traditionally live by seasonal work and fortunetelling; they are believed to have originated in northern India but now are living on all continents (but mostly in Europe, North Africa, and North America)