All brick palettes have minor imperfections - warping is listed

Materials: All of the Sylvan Clayworks products are made with a cone 6stoneware with a white glossy glaze. it will retain its temperature longer than glassware and may be placed in your microwave, oven, or dishwasher with some stipulations found HERE.

Rubber Bumpers: This product does not come with rubber bumpers (purchase here)