There are many travel mugs that have a smaller diameter base that fits into the Fiesta cup holder. The smaller diameter niche in the middle is for an energy drink can. It doesn’t require much space. But, if had been designing it I would have just created a drop in bushing to hold something like that and kept the traditional dimensions for the cup holders and maybe created something like a smartphone holder or whatever. These spaces are fertile ground for multiple purpose adapters that could become a possible accessory package. But Ford wouldn’t do anything like that because they are determined to not make a profit on small cars.