Coca-Cola Co. lit up its headquarters tower on North Avenue Friday night, turning the 26-story building into a giant projection screen showing contour bottles and scenes from the company's advertising.

Hundreds of invited guests held smartphones to the sky as the building lit up at 9 p.m. The structure looked for a moment like a giant cup of ice being filled with Coca-Cola, and then like a four-sided bottle. The show used photos posted by Coca-Cola's Facebook fans, as well as images from a library of Coca-Cola advertising.

Coca-Cola Co. is celebrating the 125th anniversary of its namesake brand this year. The illumination will be on display every Thursday, Friday and Saturday evening in May.

Coca-Cola said it was the world's largest single-building illumination. It covered 210,000 square feet and used 45 industrial-strength projectors to throw out 1 million lumens of light.