Magic Mug
Available in 11 ounces these amazing mugs are plain black in their normal state, But as soon as you pour a hot beverage the special oxidized ink creates a magic and the design appears onto the mug. These are not recommended for microwave use.
Product color may slightly vary due to difference in rendered images and physical product and also due to difference in your monitor/screen settings. Shown is the mockup. Area around the handle is not printed on.