Screw caps are closures used primarily for bottles, especially in the wine and beverage industry. They are designed to twist on and off, providing a secure seal that helps preserve the contents inside. Unlike traditional corks, screw caps are often made from metal or plastic and can be easier to open and reseal. These caps have gained popularity due to their convenience and effectiveness in preventing oxidation and spoilage. Many winemakers appreciate screw caps for their ability to maintain consistent quality over time, making them a practical choice for both consumers and producers.