Lid with filter: The dedicated lid allows you to pour tea until it is attached, so you dont miss the smell of your tea and keep it warm. The stainless steel filter is equipped inside so there is no need to prepare a tea strainer, just tilt the flask and pour tea into the cup. In addition, the spout of the tea is shaped to allow the liquid to flow through the inside, preventing the taper and thermal cover from getting dirty. (Drip Free)