PO: Pao Thermo Mug Double-walled Stainless Steel Best Travel Mug with Tea Infuser and Filter Functions in One (Grey with Black Lid) A two-way tea-leaf compartment ?V Brew and Filter Turn it upside down to start brewing & control time, preventing the bitter taste of over brewing Switch the filter flap to filter out chunk leaves or rose buds Comply with food grade standards of LFGB and FDA BPA Free