Large Pebbles Backflow Incense Burner. Black ceramic backflow incense burner in a rounded cocoon design. Place a backflow cone on the top, light and watch as smoke gently falls across the tiers and pools below.. For best effects burn indoors in an area away from any sudden air movements. Please note that after burning 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. Only backflow incense cones should be used with this product â€\" standard incense cones will not create the desired effect. It is normal for cones to take up to 10 minutes after being lit to start creating the smoking/mist effect. We supply a selection of backflow incense cones in a variety of scents.. Made In China. Sourced from a UK importer.. Features:. Large ceramic stacked pebble design.. Size: 90mm x 120mm x 75mm. Weight: 0.3kg. A stunningly simple backflow incense burner.. 100% Ceramic.. Wipe clean.. When the cone is lit, smoke cascades downwards in a mesmerising waterfall effect.