Nog is a rich, creamy beverage traditionally made with milk, sugar, and eggs. It is often flavored with spices like nutmeg or cinnamon and can be served hot or cold. The most popular version is egg nog, which includes whipped egg yolks and egg whites, giving it a frothy texture. Nog is commonly associated with the holiday season, particularly in North America, where it is enjoyed at festive gatherings and celebrations. Some variations include alcohol, such as rum or bourbon, while non-alcoholic versions are also widely available, making it a versatile drink for all ages.