Abstract: The illuminating liquid is the first liquid illuminator that can fit on any standard sports events, or business logo poly bottle and does not require the owner to purchase a special container to advertise his logo. The inventor has intended the patent to be only for the bottom part of the Liquid Illuminator. Using an LED rather than a light as other inventions, the illumination is brighter and will light up a greater variation of liquids. The advertiser logo needs to be silk screened on the poly bottle and does not have to be applied in any other manner. The illuminating of the liquid with the switch in conjunction with the battery and LED illuminates the image or logo on the bottle.