Backflow Incense Burners: Specially designed to create smoke that dramatically cascades down the burner with a stunning effect. Light your incense cone and then blow out the flame, it will begin to smoke, the incense is heavier than air and will fall dramatically in swirls and twists, through the hole and down over the holder, to pool at the bottom. It is incredible to watch and very relaxing. Also, check out our range of natural ingredients backflow incense cones.