The VSITOO Control Smart Coffee Mug is a 14oz black stainless steel mug that can be controlled through a smartphone app. It features a heat-changing design that reveals a happy face when filled with hot liquid above 70°C (158°F), and comes with a lid to prevent spills. This mug is suitable for all occasions, including bachelorette and bachelor parties, anniversaries, birthdays, and holidays such as Easter, Christmas, and Halloween. It is perfect for celebrity fans and those who enjoy food and kitchen-themed items.