The THERMACUP 12oz Temperature Control Mug in Midnight Black is a premium self-heating coffee mug that is perfect for all occasions. This round mug has a capacity of 12 fl oz and is made of stainless steel with a ceramic coating, making it suitable for hot beverages. It comes with a removable slider lid, charging coaster, charger 120V, and replacement lid seal. The mug is designed with a self-heated coffee mug feature and has a sleek black color. It is a stylish and practical choice for those who enjoy having hot beverages on the go.