A bulk bag comprises eight substantially identical side wall portions each containing a stiffening panel. A bottom wall is connected to the bottom edges of the side wall portions and may be provided with a discharge port. Alternatively, a discharge port may be provided in one of the side wall portions. The bulk bag may be provided with a top wall which may be either openable or secured in place. A pallet and/or lift loops may be provided for transporting the bulk bag and the contents thereof.