Well, this is a find! I've never seen a glazed, ceramic pour-over coffee filter before! It's so cool, with a swirly blue-green glossy glaze on it with a bit of swirl in the design of the clay, as well. Very substantial with a nice handle and about a 3/4" hole for the coffee to drip through. Maybe from the 1970's? It takes standard #2 paper drip filters.