Abstract: A tag housing assembly for attaching an electronic tag to an extending neck of a bottle with a perimetrical undercut thereabout. The tag housing assembly includes a tag housing, at least one electronic tag and a retaining device. The tag housing includes a perimetrical exterior side wall extending between a top surface and a base plate to define an interior and an opening extending through the top surface and base plate for receiving the extending neck of the bottle. The at least one electronic tag is located in the interior. The retaining device extends into the opening and defines an adjustable aperture for engaging the extending neck of the bottle. When the tag housing is in a closed position, the retaining device is secured to the neck of the bottle.