Grey Goose is produced using a five-step distillation process in a copper pot still using a selection of the finest grains. Blended with water naturally purified through champagne limestone from the Gente Springs in Cognac, France; Grey Goose is created under the watchful eye of a master distiller.Grey Goose is produced using a five-step distillation process in a copper pot still using a selection of the finest grains. Blended with water naturally purified through champagne limestone from the Gente Springs in Cognac, France Grey Goose is created under the watchful eye of a master distiller.?