The automatic drink dispensing cup is of added commercial value to the food industry, adding an entertainment value to the drinking of refreshments. The pulsed light illumination has a selectable wavelength, irradiance, dose, and onoff duty cycle. The first semiconductor layer has a first germanium percentage higher than a second germanium percentage of the second semiconductor layer. In certain embodiments, the polymer region is an outer layer and the metallic region is an inner layer of the device. Each of the connecting portions covers the inserted opening, both cut sides of which are pressed against by a pair of protecting protrusions which integrally protrudes outwards from both sides of inserted opening of the insulative housing.