FOOD GRADE STAINLESS STEEL: tea infuser is made of high quality food grade 304 stainless steel. The tea strainer has strong corrosion resistance, strong durability and high hardness. The tea filter is not easy to rust after long-term use. ADVANCED DESIGN: This tea filter is designed with a hook, which hangs on the edge of the cup and will not fall off. The ultra-fine mesh design allows faster and easier aroma release during brewing or steeping, while preventing tea leaves and particles from floating around the water. EASY TO CLEAN: The mesh tea steeper is easy to clean. A brush is recommended for better cleaning of the interior. It is also safe to use in the dishwasher. Dry after cleaning for better maintenance and will last for years. ROUNDED EDGE DESIGN: The whole tea diffuser is processed by grinding, it is smooth and does not hurt hands, it is round and has no burrs, and it is not afraid of hurting hands when holding tea. The smooth surface also makes it easier to clean. SMALL AND PORTABLE: The portable tea strainer is small in size, light in weight and easy to carry. It is suitable for various scenarios, such as office, home, business travel and so on.