a box-shaped body portion that has a bottom face part and a side face part; and

a plate-shaped partition portion that has a through hole allowing urine to pass therethrough, and divides an inside of the body portion vertically, an inner surface of the through hole being in a cylindrical shape, wherein:

a first thickness that is a thickness of the partition portion in a surrounding part around the through hole is smaller than a second thickness that is a thickness of the partition portion in a remaining part, the remaining part being a part other than the surrounding part and surrounding the surrounding part,

an upper surface and a lower surface of the surrounding part are parallel to each other, each of the upper surface and the lower surface of the surrounding part inclining downward toward the through hole, and

the first thickness is half or less of the second thickness, the second thickness is a maximum thickness of the partition portion, and a third thickness that is a thickness of the through hole is less than the second thickness.