A foldable container blank includes at four side walls, a top panel foldably connected to one of the side walls, a bottom panel foldably connected to one of the side walls, and at least one internal support structure that is connected to one of the side walls. Each internal support structure includes a first portion that is in adjacent relation with the top panel when the container is in a closed condition, and a second portion that is in adjacent relation with the first portion when the container is in a closed condition. In some embodiments, the foldable container blank is integrally formed. A method of forming the foldable container blank and a method of folding a container blank are also provided.