Cotton bags are a type of reusable bag made from cotton fabric. They are a sustainable alternative to single-use plastic bags, which are harmful to the environment. Cotton bags come in a variety of sizes, styles, and designs, and can be used for a wide range of purposes, including shopping, carrying books or supplies, and as a fashion accessory. Here are some common types of cotton bags:

1. Tote Bags: Tote bags are a popular style of cotton bag that are versatile and easy to carry. They often have two shoulder straps and a spacious interior for carrying groceries, books, or other items.

2. Drawstring Bags: Drawstring bags are a type of cotton bag that have a closure at the top, which can be pulled tight with a drawstring. They are often used as gym bags or backpacks for carrying lightweight items.   

3. Cotton bags are a sustainable and stylish option for carrying items, and they can be customized with logos or designs to promote a business or organization. They can be easily washed and reused, reducing waste and helping to protect the environment.