They are made of Ceramic, UV Protected, FDA Compliant, and according to our supplier, Microwave and Dishwasher Safe. However, we do recommend hand washing, as dishwasher temperatures and detergents vary and we can’t possibly warrent that ALL dishwashers are safe for the mugs. All of our mugs are made in our Indiana workshop using a heavy duty dye sublimation technique that uses extreme heat and pressure. Dye sublimation gives a great depth of color and is very wear and scratch resistant. Personalization is available upon request and for no additional charge. We cannot change fonts on this particular design. See the 2nd photo color choices. Simply include your choices in the “Notes to Seller” section during checkout.