The Backflow Principle: because the density of smoke is heavier than ...

Water????? Air?????

Air.

Unlike “normal” incense cones, the smoke of a Backflow Incense Cone does not rise into the air… it in fact drops downwards.

It gives a very similar effect as dry ice, slowly finding its way to the lowest point to the ground."

where 2 get one?

Amazon. Where else?

That is so cool!
Do you have to use special incense?

Special incense is necessary. When you order the burner it usually comes with it and you can order more. The incense has a little hole drilled up thru the middle almost to the top. There's a hole at the top of the burner and you just line them up. It's very slow and you can't have ANY air circulating in the room. NONE. Breathing to close to it will screw it up! I'm not thrilled with the smell of the incense but you really don't have a choice. I have 2 of them and will definitely be getting another. They range in price from $15 to $50. They're just really cool!

I went right away and looked at them lol I backed out of buying one because of my doggie. Strong smells mess his breathing up. I bet it's cool to watch though

Awwwwwwww, that's a shame...

Thank you for sharing this information with us! How very cooooool!!!!!

You're very welcome