Natural Hem Opium Back flow Incense Cones from India are made for back flow incense burners which allow the incense smoke to reverse flow creating a mystical effect with the pleasing aroma of various types of incense.
Light the incense and sit on a back flow burner. After a minute or so, the smoke will reverse from the top to the bottom hole and cascade down and around giving a mystical effect - completely mesmerizing!