Each piece is one-of-a-kind and distinguished by unique characteristics such as variation in size and color due to the handmade process. All of my work is made from stoneware clay and lead-free glazes. I recommend hand washing only, as dishwasher detergent chemicals can harshly affect handmade pottery. And because microwaves may not heat evenly and may unduly heat the natural metals in the clay, please do not put in the microwave. Use your handmade pottery with care, but use it every day!