Signature Housewares Window Pane 12-Ounce Stoneware Mug 12-Ounce mug from the contemporary windowpane collection by Signature Housewares Constructed of glazed stoneware - a dense, strong, and durable ceramic Geometric, craftsman-style pattern reminiscent of stained glass; reactive glaze gives each piece its own unique character Microwave and dishwasher-safe Modern color palette of blue, red, gray and ivory with black details