The Fortuna 12 oz Double-Wall Ceramic Tumbler is made of 2-Tone double-wall ceramic stoneware with a plastic push-on lid with a silicone ring that prevents spills. It fits most car and truck cup holders and durable ceramic has a non-metallic taste and will not rust or stain. Recommended hand wash only and should not be put in the microwave or freezer. Must be ordered in exact case quantities and may ship from CA location. FDA certified.