This is a smart cup / vacuum cup with a capacity of 500 ml, equipped with an LED screen on the lid to display the temperature of the drink inside. Functionality: * Keeps drinks hot or cold for long hours. * When the lid is touched, the temperature appears on the digital screen. * Suitable for coffee, tea, cold water, etc. From the writing on the box: * Capacity: 500 mL * LED temperature display screen * Multi-layer thermal insulation. * Claims to maintain heat for up to 24 hours (actual duration may vary depending on usage). If you open the lid and pour a hot or cold drink inside, then touch the top of the lid, the drink's temperature will appear, such as 20°C or others. The second (the green box from WINMAX) is also a smart thermos (Vacuum Cup), and its function is almost similar to the first, but it seems to be from a different brand and a different design. Features visible on the box: * 500 ml capacity. * LED screen on the lid displays the drink's temperature. * Thermal insulation to keep drinks hot or cold for a long time. * Tight lid to prevent leaks. * Suitable for coffee, tea, and water. In general, the first and second perform almost the same function, and the difference is often in: * Manufacturing quality. * Duration of heat preservation. * Type of internal metal (preferably stainless steel 304). * Accuracy of the temperature screen and insulation. (( New, unused ))