A container assembly (10) for retaining a liquid (14) during aging of the liquid (14) includes a container (12), a first flavor insert (16), and an insert retainer assembly (18). The container (12) defines a chamber (12A) which receives and retains the liquid (14). The first flavor insert (16) imparts a flavor on the liquid (14). The insert retainer assembly (18) is positioned within the chamber (12A) and is secured to the container (12). The insert retainer assembly (18) includes an alignment rack (30) and a retainer rack (32). The alignment rack (30) includes a first alignment guide (30C) that guides the first flavor insert (16) during positioning of the first flavor insert (16) within the container (12). The retainer rack (32) has a first attacher (32C) that selectively and individually engages the first flavor insert (16) to inhibit large scale movement of the first flavor insert (16) relative to the retainer rack (32).