40ft Plug-Door Overhead Ice Reefer – model by True Line Trains. As evidenced by the “Heater Service Only – Do Not Ice” stencil on the bottom of the car, this is no longer an ice reefer on our layout. During the 1970s, these decommissioned reefers were being used as insulated/heated boxcars (the under-slung heater units were still active) in pooled beer service for Brewers Retail throughout northern Ontario.