Abstract: An identification system for an assembly such as a baby bottle, including a cylindrical container and at least one selectively removable component. The identification system identifies that the cylindrical container and the removable component are associated with each other and with a particular user. The removable component may be a bottle ring or a cap member. A first elastomeric band is engageable with an outer surface of the bottle. A second elastomeric band is engageable with an outer surface of the ring or cap member. The first and second elastomeric bands include associated identification features which may include a color, a name, a symbol and combinations thereof. At least the first elastomeric band may include a temperature sensitive indicator, such as a thermochromatic dye. The identification system may include a third elastomeric band for use on the other of the ring or cap member to associate the container, the ring, and the cap member with each other and with a particular user.