Backflow Burners are suitable for use with Backflow Cones ONLY, which have a hole in the base that aligns with a hole or channel on the burner. Once the burning cone reaches the hollow area (allow a couple of minutes) the smoke will flow downwards in a stunning waterfall effect. If used with Standard Cones, smoke will flow from the top of the cone as usual and there will be no cascade effect – make sure you purchase special BACKFLOW CONES for the correct effect
 
This gorgeous Buddha sitting and meditating on a waterfall will have the smoke cascading down from the top into the second tier, then down to the bottom in a waterfall fashion.