Screw caps are closures used primarily for bottles, allowing for easy opening and resealing. They are commonly made from materials like plastic or metal and provide a tight seal to keep contents fresh. Unlike traditional corks, screw caps can be easily twisted on and off, making them user-friendly. These caps are widely used in the wine, beverage, and food industries. Many winemakers have adopted screw caps for their bottles, as they help prevent spoilage and oxidation. Additionally, screw caps are often more cost-effective and environmentally friendly compared to cork, which requires harvesting from cork oak trees.