A cooler for cooling product pursuant to a distillation process, including a first substantially enclosed housing with an inlet proximate a first end for receiving product from a distillation unit, and an outlet proximate a second end for discharging cooled product, and a first auger substantially enclosed within the housing for driving the product from the inlet to the outlet, the auger having a helical blade circumscribing a perforated central hollow shaft for transmitting cooled gas into the housing to help cool product within the housing.