The Stainless Mug with Tea Leaf Filter features a Tea Leaf Filter for steeping fresh tea right inside the mug and stops tea leaves from flowing out while drinking. It has a smaller diameter than previous mugs for an easier grip. • Stainless steel vacuum insulation keeps beverages hot or cold for hours • Easy-to-clean nonstick coated interior • Tight fitted lid keeps beverages hotter or colder than travel mugs • Made of BPA-free plastic and stainless steel • Size (width x depth x height): 6.5cm x 6.5cm x 17.0cm • Heat retention: 66°C @ 6hrs • Cold retention: 9°C @ 6hrs