Mugs are dishwasher/microwave-safe, printed on white ceramic, 15oz., C-handle, lead and BPA-free. It will turn perfectly on white or pastel colors. I don't do dark colors, such as black or navy. Minimum order is 12 pieces, but you can mix colors from 2-3 backgrounds we confirmed, usually I do 1 color white and 1-2 colorful ones. Great product for your downtown gift/souvenir shop/antique mall for locals and visitors! The product pictures represent my artwork style, product visualization of some cities landmarks. Check my bio/page info/story to find your city on the picture. I have illustrated 70+ cities of 25 States. Feel free to choose from cities in stock or make a custom illustration with me FOR FREE with ordering a little bigger minimums with the first order!