This is a really unique piece from TBPots Pottery in Maine. Signed 'TB' on the bottom. The two-piece set is a microwave egg poacher (instructions taped to lid). Or you can use it as a decorative bowl since it's so pretty. Heavy blue stoneware with a swirl handle (reminiscent of a nautilus). Bowl (excluding lid) measures 2" tall x 4-1/8" diameter.