Backflow incense are hollow incense cones pressed into shape. Burning incense releases hot air in the form of smoke, but the air stays cooler in the cavity inside the cone. This causes the smoke to flow downward instead of rising.
Backflow incense flow beautifully downwards and they are designed to be burned in their own special holder. Place the backflow incense on the top of the holder and light the incense as usual. Let the incense burn for a while on the flame and then blow the flame out. Enjoy the smooth flow of smoke along with the atmospheric fragrance.