To provide a top easily changed in form such as a pattern and shape.

This top 1 is provided with a plurality of separable members that are a stem 2, a body part 3 and a knob part 4. The body part 3 is further separable into a center part 5, an outer peripheral part 6 and an upper edge part 7. These members have spiral parts that are external spiral grooves 2b, 5c, 6d or internal spiral grooves 4a, 5b, 6c, 7a, and the external spiral grooves 2b, 5c, 6d and the corresponding internal spiral grooves 4a, 5b, 6c, 7a are connected by spiral fastening and integrated. The top 1 can be easily changed in form since part of members can be easily replaced with the other member having the same spiral part but different in form, by detaching the spiral parts.