This incense holder can be used exclusively for incense cones!
The lotus has been a symbol of purity since before the time of the Buddha, and it blooms profusely in Buddhist art and literature. Its roots are in muddy water, but the lotus flower rises above the mud to bloom clean and fragrant. In Buddhist art, a fully blooming lotus flower signifies enlightenment, while a closed bud represents a time before enlightenment. Sometimes a flower is partly open, with its center hidden, indicating that enlightenment is beyond ordinary sight.
Read more about it here: https://www.learnreligions.com/the-symbol-of-the-lotus-449957