PURPOSE: To sufficiently exhibit an effect for appealing when contents are swollen for decoration in a lid which can be attached to a cup-like container body.

CONSTITUTION: A lid 1 comprises a side wail 11 fit to an upper opening of a container body 3 from outside and a top plate 12 attached to the side wall 11 and swollen like a dome. Since the swollen part of the top plate 12 forms a space above the container body 3, contents can be raised above the upper rim of the container body 3 when they are used for decoration, as well as they can be seen from side when the lid 1 is opened. Further, by providing a window hole at the top plate 12, the decoration inside can be seen from outside even if the lid is put on. In addition when container bodies 3 with lid are stacked, a part of the top plate 12 of a lower lid 1 is fit into a leg part of an upper container body 3, so that they may not shift laterally.