Once Backflow Incense Cone is lit and placed on the burner designed place, it will create smoke which will be pouring down the tower with a stunning effect that will catch your everyone's eye.  These cones are only for use with Backflow Incense Burners.Each tub contains 45 assorted incense cones.Warning: Keep away from children. Backflow Incense can damage varnished surfaces, always use on a mat. To be used indoor and with no drafts for best effects.