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If a kitchen utensil is made from sheet metal then the slots, drainage holes or hanging holes have probably been punched before or during forming or pressing.
Girotondo stainless steel tray by alessi. The little men holes round the edge have been punched out of the tray using a multiple punch. It maybe that it was shallow formed at the same time as punching or it could have been formed then punched.
They could be grilles for speakers or an intercom. However they have been punched and then pressed into a shallow dome.