A solar jar lid having a solar unit and having a support housing that supports the solar unit, and wherein the solar unit has a light emitting diode. The support housing has an internal thread such that it can be threaded to ajar and defines an opening for receiving a straw. The support housing is capable of being threaded to a jar. When the light emitting diode is turned on a beverage in the jar is illuminated. In another embodiment the support housing is replaced with a tabbed support housing, and in another embodiment the support housing is replaced with a clamp arm support housing. The solar unit includes a solar panel and rechargeable battery and may include an on and off switch. The user fills the jar with a beverage and the light emitting diode illuminates the beverage as the user drinks the beverage through the straw.