This set of 16 ounce stoneware travel mugs are created in a similar fashion to acrylic pouring. Instead of paint, liquid colored clays are used to create the unique abstract patterns. Each mug is different and truly piece of functional abstract art. The bright colors make our mugs equally well-suited to special occasions and everyday meals. The mugs are finished in a food safe gloss clear. The lid is made and manufactured in the US. It is BPA free and has a locking mechanism to prevent spills. I feel it is better than any other lid for travel mugs. The mug and lid are microwave and dishwasher safe. Details: - Measures 6 inches tall and 3 inches in circumference. - Crafted of white stoneware clay for exceptional strength. - Microwave and dishwasher safe. - Leakproof locking lid included.