Designed especially for its limited-edition, 16-ounce cans in honor of “The Dark Knight Rises,” Mountain Dew partnered with Chromatic Technologies Inc. (CTI) to add a color-changing element to the can’s design. When chilled to 46.4 degrees Fahrenheit, the Batman logo on the can changes from silver to green. Using CTI’s thermochromic ink, Mountain Dew created an interactive experience for its consumers and enhanced brand credibility, it says.