A REEFER CONTAINER is a short form for REFRIGERATED CONTAINER. Simply put, reefer containers are big fridges that are used to transport temperature controlled cargoes such as fruits, meat, fish, seafood, vegetables, dairy and also also non-food products such as flowers, pharmaceuticals and film across many miles and oceans.. Some cargoes may need to be shipped chilled or frozen or in controlled + temperatures. Reefer containers have the ability to maintain the cargo at the required temperatures for the duration of the transit.