The Mainstays Self-Warming Mug is a modern, sleekly designed stainless steel mug perfect for any occasion. With a 12 oz capacity, this self-warming mug features adjustable temperature settings and a double-walled design to keep your drinks hot for longer periods. It comes with a lid, a charging coaster, and a power adapter, making it a convenient and practical choice for coffee or tea lovers. The black color and solid pattern add a touch of elegance, while the non-slip coaster ensures stability while using.