A bag is a container made out of various materials, including fabric, leather, plastic, or paper, used to hold, carry, or store items such as clothes, books, groceries, or personal belongings. Bags come in different shapes and sizes, with various design features, such as pockets, zippers, handles, and straps. Some common types of bags include backpacks, handbags, tote bags, duffel bags, briefcases, and messenger bags. Bags can serve numerous purposes ranging from functional to fashionable.