This is a water tank lid for the Profitec 800 lever espresso machine. It wiggles a bit but will not fall into the tank. I would recommend black.
The author remixed this model.
I removed the outer lip, decreased the height, and adjusted the length and width to the dimensions of the tank. I made the changes according to measurements given to me by a friend who needed a lid. He said it fits and gets the job done.