A tool for forming a container from a construct. The container comprises a bottom wall and at least one sidewall foldably connected to and extending upwardly from the bottom wall to form an interior space of the container. The tool comprises a cavity having at least one peripheral wall for at least partially forming the sidewall of the container. The tool comprises a core operatively associated with the cavity and being operable to move within the cavity to position the at least one sidewall of the container relative to the bottom wall to form the interior space. The tool comprises at least one articulated section movably received in the cavity. The at least one articulated section being for gripping at least a portion of the at least one sidewall of the construct, when the core is moved relative to the cavity to form the interior space of the container.