This is a ceramic plate! It's the Topography Plate from Kyouei Design by Japanese designer Kouichi Okamoto. From their website, "please pour the soup into this plate. mountain range and a lake are completed. and the bottom of a lake appears when you eat the soup. please enjoy the taste, the landscape and topography of the plate.when you use it as a salad dish, it becomes a forest.you can create a landscape on your very own table."