Originally, the cooper was the barrel master of a winery who was responsible for the production, installation and maintenance of the barrels. The name was derived from the cooperage (barrel making). Later it developed into the responsibility for the cellar work during the winemaking process. In Germany, the name Weinhandelsküfer was common until 1982, when the new professional title Weintechnologe was introduced in 2014. His area of responsibility includes the reception and pressing of the grapes, the control and monitoring of fermentation and ageing of the wines, as well as determining the time of bottling.