Premium Series Plug Door Reefer Cars from American Models
Fruit Growers Express
Otherwise know as an insulated box car, some of these have refrigerator units mounted on the underframe; however, most were just "insulated" from wide temperature changes. Used for everything from beer, meat or packaged good to steel auto parts. Identified by the large, thick door that actually "plugs" into the wall of the body.
Note: Cars are available in two or four number variations, and in ready-to-run and "deluxe" versions with see-through roofwalk.