Hand Lotus Backflow Incense Burner Ceramic Statue Handcrafted New in Box. The Backflow Principle: because the density of smoke is heavier than the air density, smoke stream from the high down like a waterfall. Choose a flat windless place light up the top of the backflow cone, burn it fully in case you have to light it again. Slowly the smog will stream down into a dreamlike waterfall show. Condition is Brand New in Box and includes one incense stick (this is for show really. you need an incense cone for best results.)