Backflow burners are becoming increasingly popular due to their unique and mesmerizing smoke effect. These burners use special incense cones that have a hollow center and are designed to release smoke in a specific way. As the incense cone burns, the smoke flows downward and creates a cascading effect, resembling a waterfall. The design of the burner allows for the smoke to flow backward, which is where the name "backflow" comes from. Backflow burners come in various shapes and sizes and are often made from ceramic or other heat-resistant materials. They make a beautiful addition to any room and are often used for relaxation, meditation, or to create a calming atmosphere.