This all-in-one tea mug with an infuser and lid is crafted from high-quality borosilicate glass, resistant to both heat and cold, and capable of withstanding temperatures from -4 to 302 ℉. The built-in tea infuser makes it easy to steep loose leaf tea directly in the cup, offering convenience and elegance in one design. Featuring a wooden handle and lid, this tea mug exudes a sophisticated look, making it an excellent gift for tea lovers and loved ones. For longevity, hand washing is recommended to preserve its beauty and functionality.