Cotton batti, also known as cotton wick or cotton wad, is a small piece of cotton used in Hindu rituals and ceremonies, particularly in lighting lamps and diyas (small oil lamps). The cotton batti is usually made by rolling a small amount of cotton into a cylindrical shape and is then dipped into ghee or oil to make it flammable. It is placed into the lamp and lit to produce a flame. The flame is believed to represent knowledge or enlightenment, and the use of cotton batti is considered to be a symbolic offering to the deity being worshipped. Cotton batti is an important part of Hindu traditions and is widely used in homes, temples, and other places of worship.