A blank of sheet material for forming a container is provided. The blank includes a series of four generally rectangular panels connected along a plurality of substantially parallel fold lines. The panels include a first spaced-apart pair of panels and a second spaced-apart pair of panels. Each of the second spaced-apart pair of panels is connected to at least one panel of the first spaced-apart pair of panels. The blank also includes a corner panel extending from each side edge of each panel of the first pair of panels, and a lateral flap extending from each side edge of each panel of the second pair of panels, wherein each lateral flap has free side edges.