Sky BLUE mugs are no different. The beautiful sky blue color of these mugs is achieved through the careful glazing process, making each one a truly unique piece of art. The mugs are made from stoneware and hand thrown on the potter's wheel, adding to their authenticity and charm. Fired at cone 5, these mugs display the true Stephanne Martin touch and bring a touch of Austin, Texas to your kitchen. Whether you use them for your morning coffee, tea, or favorite hot beverage, these mugs are not only beautiful but also food, oven, microwave, and dishwasher safe, making them practical for everyday use.