I love these ceramic bowl burners.
They are so versatile.
You can use them for burning charcoal incense, stick incense or cone incense.
Each bowl comes with a bag of black sand.
The sand diffuses the heat from the charcoal and it also serves as an anchor for stick incense and a base and heat diffuser for cone incense.
Also, for stick incense you can light many sticks at one time. You just stick the sticks into the sand and if you position the sticks just right the ash from the spent incense will fall right into the bowl so you have little if any mess to clean up.