Abstract: An illuminated drinking vessel includes an upper fluid-retaining cup and a lower hollow supporting stem. A light emitting diode is mounted within the hollow stem adjacent to the upper cup, and a pair of switch mechanisms are provided for selectively connecting the light emitting diode with a battery mounted within the hollow stem. More particularly, a first switch mechanism is provided that is actuated by grasping the supporting stem when lifting the drinking vessel. A second switch mechanism is actuated upon filling of the upper cup with a fluid when the supporting stem is resting on a generally horizontal surface.