747-400 Interior Solutions features blended main cabin ceilings and center stowbins; softer, smoother-contoured surfaces that help reduce shadowing and provide a more open feeling in the cabin, resulting in an interior similar to the modern, graceful lines of the 777 interior. The upper deck's enhanced overhead bins and floor-mounted stowage boxes (shown here on a mock-up) can accommodate 12 to 14 more 14- by 9- by 22-inch bags.