Backflow cone burner Material: glazed ceramic Measurements: 11 x 7 cm - height 12.5 cm Backflow cone burners are indispensable accessories for creating the magic and atmosphere of smoke cascades. Thanks to the synergy between these glazed ceramic objects and aromatic backflow cones, your surroundings will receive a touch of originality, and you will feel immersed in a Zen and relaxing atmosphere. How do the BACKFLOW cones work? It is all due to their special composition, shape and the burners that are used. Backflow cones have emerged in the last period as a sure-fire item.