Single fired at up to 1180°C to create a unique ceramic body with a special bonding between the clay and the glazed surface, resulting in a more durable product. Freezer, oven, microwave and dishwasher safe. All stoneware is hand-finished. Any irregularities, colour variations or small imperfections should not be considered as defects, but unique marks of authenticity. With a design inspired by the lapping of ocean waves, the Grespresso coffee cup collection brings an organic, artisanal beauty to coffee drinking. But they are so much more; these functional beakers are perfect for serving hors d'oeuvres & dipping sauces, baking souffles & as decorative tea light holders.