A screw cap is a type of closure used primarily for bottles, especially in the wine and beverage industry. Unlike traditional corks, screw caps are made of metal and feature a threaded design that allows them to be easily twisted on and off. This design helps to create a tight seal, preventing air from entering the bottle and preserving the contents inside. Screw caps are popular for their convenience and reliability. They eliminate the need for corkscrews and reduce the risk of cork taint, which can spoil wine. Many producers, including those in the wine and spirits industries, have adopted screw caps to ensure quality and ease of use for consumers.