It's 2022, which means it is now the Chinese Year of the Tiger. Apple is marking this event with special editions of its flagship TWS earbuds, not to mention those of its brand Beats. They are customized with themed accents, which includes unique engravings for the AirPods Pro - Tiger charging cases.
https://www.notebookcheck.net/Apple-releases-Year-of-the-Tiger-themed-AirPods-Pros-and-Beats-Studio-Buds.589457.0.html