A two-piece storage box made from corrugated board, comprising a base and a lid which are both double-walled on two sides. While closed the box is triple-walled all around and thus very sturdy. The folding construction ensures smooth interior surfaces. Our most popular two-piece storage box, umpteen times in use. Ideal for the storage of large-sized objects, e.g. textiles, musical instruments, paintings, art objects etc.