Capture the essence of water, air, earth, and fire with this collection that soothes, revives, grounds, and ignites - awakening our natural connection to the elements. Part of the element collection of coordinating mugs, bowls, and serve ware from Danica Heirloom. size: dia5.5in. material content: stoneware with a reactive glaze. care instructions: dishwasher safe. the nature and beauty of reactive glaze are that each piece is unique. There may be slight variations in color, texture, and finish to each perfectly imperfect item.