Backflow incense has gained popularity in recent years.  It sort of defeats the purpose to have the smoke go down, but whatever.  It requires specially shaped backflow cones & a holder with a channel for the smoke.   Imagine backflow incense coming out the rear end of a starship.  

The lion kingdom's original idea of an incense stick inside a starship never took off.  The trick is a clamp which keeps the stick in a vertical orientation.  The stick could then fit inside a starship enclosure or cutaway.