Our handcrafted Ronan Dinnerware Collection features a reactive glaze over stoneware, resulting in a warm ivory color with uniquely varying patterns and markings to create a modern yet rustic tablescape aesthetic. Stoneware tableware made by our Portuguese artisan partners. Features a reactive glaze finish. Microwave safe. Set of four mugs; each with an 11 oz. capacity. Due to the nature of this collection and its reactive glaze finishes, each piece may vary slightly in color and pattern; adding unique character without affecting performance.