The Gibson Ultra Courtyard 12 piece set has a simple, yet classic design featuring embossed outer stripes. This set is constructed with tempered opal glass that is stronger than regular stoneware. Internal tests show the material out performs other stoneware dishes by as much as 3 times in terms of impact resistance and 4 times in chip resistance. The high fired glaze creates a more hygienic, fully vitrified surface with almost zero porosity. This set is dishwasher, microwave, and freezer safe for easy storage, clean up, and reheating.