A cooper is a craftsperson who makes and repairs wooden barrels, casks, and other containers held together with metal hoops. Before plastic and cardboard boxes existed, barrels were how people stored and transported almost everything: flour, nails, gunpowder, salted fish, and drinking water.

Being a cooper required specialized skills. The wooden pieces, called staves, had to fit together perfectly without any glue or nails, curved just right so the barrel would be watertight and strong enough to roll across cobblestones or survive an ocean voyage. A talented cooper could look at a piece of oak and see the barrel hidden inside it.

Coopers were essential workers for centuries. Armies needed them to make barrels for supplies. Ships couldn't sail without a cooper on board to repair leaking water casks. Breweries and wineries depended on them completely. The profession was so important that “Cooper” became a common last name, just like Smith or Baker, passed down through families whose ancestors practiced the trade.

While modern factories now make most barrels by machine, some coopers still practice the craft today, especially for aging fine wines and spirits. The barrels they create aren't just containers: they can add flavor and character to what's stored inside them.