The present invention relates to a device for illuminating bottles that fits within and adheres to the naturally occurring concave recess at the bottom of a bottle. The device is intended to be inserted into the cavity and dimensioned to sit flush against a bottle when the device is placed within the concave recess at the bottom of the bottle. Other electrical elements may be included which provide for control of intensity, fluctuations in intensity, and to control power to the device. The device may also contain electrical components to allow wireless control of device and the ability to control device via smartphone. The device further includes an improved means for securing the device in the bottle, while maintaining a water tight seal. The device is intended to be used in conjunction with containers to provide an illumination of the bottle, creating a unique effect for displaying containers.