These Goloka Dragon Blood incense backflow cones come in a handy resealable tin. There are 24 cones in each tin with a burning time of approx 20 minutes per cone. These incense cones can be used along with a backflow burner to create impressive smoke flow displays. Goloka has been creating quality incense for over 16 years and part of their proceeds are given to charitable causes that help to provide meals for underprivileged children and provide vocational training and scholarships. Please note that it is normal for backflow cones to take up to 10 minutes to create a smoking/mist effect when used with a backflow burner. After burning backflow cones it is normal for a light oily residue to appear on the oil burner, for this reason, we recommend protecting any furniture it is placed upon suitably. The residue can be easily wiped off the burner with a damp cloth. Please exercise caution when burning incense.