This is a multi-functional mug called "Concentric Cup (Classic Concentric Cup)" from Lin's Ceramics Studio, a Taiwanese teaware brand. It's designed so you can enjoy authentic tea even without a teapot. The design is intended for easy enjoyment of Chinese tea. Set includes: Mug, inner filter (tea strainer), lid, and saucer. The box is not included, so it will be packed with recycled materials. Thank you for looking.