Famiware Saturn Dinnerware Sets, Ceramic Dishes for 4, set of 4

The pack says these plates are safe in the microwave and dishwasher. That covers daily reheating and cleaning. The stoneware body distributes heat evenly, and the reactive glaze holds up through cycles. The pack does not mention the oven or freezer, but the two you use most often are covered.

The foot ring is left unglazed. It keeps the piece from sticking during firing, and on the table it gives a slight grip. Stack them two high: the unglazed ring will mark the glaze of the plate below it. That is the nature of stoneware. Wipe the marks off if you like, or let them build.