Meditation Collection Alien in Spaceship Item #: 3153 Backflow Cone Incense Burner Measures: 3 L x 3 W x 7.5 H inches Backflow Cone Incense Burners creates the illusion of a flowing waterfall when used with back flow incense cones. When lit the cones release smoke that billows and hovers along burner channels or near its output point. The effect can be dreamy as a fountain, mysterious as a castle tower in the mist, eerie as a ominous wizard, or comforting as a pot of tea.