【304 Stainless Steel】Safety certification. Odorless. Contains no harmful chemicals. The safety of immersing in hot water is superior to using plastic. Make your drink free peculiar smell and in bad taste. Easy to clean and dishwasher safe 【Fine Mesh】Without leaving the tea leaves in the cup. Thanks to these small holes, the tea water remains relatively clear, but the tea leaves do not prevent the water from flowing. 【Multifunctional Lid】The lid is also used as a small tray/coaster. Like a lid to keep flies away from the tea. As a helper, the whole table is not immediately wet when the tea filter is removed from the cup. 【Easy Cleaning】Put in hot water or strong water also can wash it in dishwasher