Halo is a vacuum bottle which can be controlled via an app. A circle of light, integrated into the rim of the lid, flashes at given times, in order to, for example, remind the user to drink water regularly. An intelligent probe measures the water temperature and indicates it in the lid using colour signals. Thanks to its three-layered structure, Halo can cool down 100 degree hot drinks to 55 degrees centigrade in one minute and maintain that temperature for more than three hours.