Coopers are skilled craftsmen who specialize in making barrels, casks, and other wooden containers. They use various types of wood, such as oak, to create sturdy and watertight vessels. Coopers have been essential in industries like brewing and winemaking, where barrels are used for aging and storing beverages. The process of coopering involves shaping wooden staves, assembling them into a barrel, and then toasting or charring the inside to enhance flavor. This traditional craft has been practiced for centuries and remains important for preserving the quality of products like wine and whiskey.