A wine bottle is a container specifically designed to hold and preserve wine. Typically made of glass, these bottles come in various shapes and sizes, with the standard size being 750 milliliters. The bottle is sealed with a cork or a screw cap to prevent air from entering, which helps maintain the wine's quality over time. Wine bottles are often labeled with important information, including the wine type, vintage year, and winery name. The color of the glass can vary, with green and brown being common choices, as these colors help protect the wine from light exposure, which can negatively affect its flavor.