Yixing Purple Clay Magpies Round Teapot contains thousands of air holes, or micro-pores, allowing a more efficient retention of heat and the ability to absorb a tea's aroma. After a succession of infusions, this teapot will develop a 'sheen'. This is the beautiful result of the tea slowly permeating to the outer surface giving a gentle glow. It takes time so patience is essential. The true way of developing this patina is by simply brewing your favorite tea in this teapot and knowing you've begun the process that will eventually result in a beautifully seasoned Yixing teapot.