A single blank for forming a box, the blank comprising a first panel, a second panel, a third panel and a fourth panel. The first panel is foldably connected to a folding support structure that is foldable and insertable inside the box. The folding support structure comprises a first inner flap which is connected to the first panel along a first inner flap fold line, a second inner flap which is connected to the first inner flap along a first inner flap second fold line, a first integral holding panel which is connected to the second inner flap along a first edge fold line, and a second integral holding panel which is foldably connected to the first integral holding panel along a second integral holding panel fold line.