I have never had a prob with my cakes smelling of cardboard, I can easily purchase cake box’s on any size, you can get extenders to fit inside to make it taller etc, and they are coated so non marking. Google “ cake boxes,” or “heavy duty cake boxes,” which can be easily reused, and are very strong with carry handles. There’s a whole load of on line suppliers out there 😊 plus they are not expensive
