Abstract: A cap including a plurality of pie-shaped sections forming a cover; a rim connecting a first end of each of the plurality of pie-shaped sections; at least one of the plurality of pie-shaped sections being a cap replacement section, wherein the cap replacement section has a first attaching part along a first section side, a second attaching part along a second section side, and a third attaching part along a section end; a first matching attaching part on a first pie-shaped section adjacent to the cap replacement section; a second matching attaching part on a second pie-shaped section adjacent to the cap replacement section and opposite the first pie-shaped section; and a third matching attaching part on the rim between the first pie-shaped section and the second pie-shaped section.