The Two Tone El Grande 15 oz Mugs are white from the outside and a color of your choice on the inside. Our mugs are microwave safe with non-metallic ink used. They can be customized using multiple imprint colors; you can simply provide us your design or leave instructions on the comment section after selecting "Help With Artwork” and our design team will accommodate you to meet your design need. You are free to request a digital proof to make sure they will look exactly the way you want them to. Therefore, our Two Tone El Grande 15 oz Mugs are perfect to represent your designs, slogans, logos or a text of your choice at an event, coffee shop, diner, bistros or at a restaurant. So hurry up and order now!