Answer: Even shaken in any direction, the censer will not tip over the burning incense, even when placed under bedding, hence its name, the "Horizontal Bed Incense Burner." Its secret lies in a double-suspension design: the inner bowl holding the incense is stabilized by an internal balance ring, while an outer balance ring holds the inner one at a right angle. Using the principle of center of gravity, the incense bowl always remains upright.

Image: China Tourism News