Wine bottles are containers specifically designed to hold and preserve wine. They are typically made of glass, which protects the contents from light and air, helping to maintain the wine's quality. Standard wine bottles usually hold 750 milliliters of liquid, but there are various sizes available, including larger formats like magnums and smaller ones like half bottles. The shape of a wine bottle can vary depending on the type of wine it contains. For example, Bordeaux bottles are tall and straight, while Burgundy bottles have a wider base and sloping shoulders. Each design serves both aesthetic and functional purposes, influencing how the wine ages and is served.