As you can see in the picture, the lid intended for a specific purpose (which has been deleted), is located above a drain opening.
See the lid in its "normal" form
Translation of the text on the cover: The emblem of the city of Ramat Gan Ramat Gan Municipality Menashe Baruch & Co. Ltd. EN124-2 D400 600 IS 489-2.2 SII 2020