What is a "bag"?

A bag is a flexible container made of cloth, leather, paper, or plastic, often used to hold personal items, groceries, or other products. They can vary in size, shape, and material, and can have various types of closures, such as zippers, drawstrings, or buckles. Bags can be used for a wide range of purposes, from carrying books to the beach, to transporting groceries from the supermarket, to carrying luggage on a trip. Some bags are designed for specific uses, such as backpacks for hiking, messenger bags for carrying books or laptops, or purses for holding personal items such as wallets, keys, and cell phones.