WCL audience gets bottles of McDonald's Big Mac sauce

CHICAGO -- The Windy City LIVE audience got a big surprise Thursday from McDonald's. Everyone went home with exclusive bottles of the special Big Mac sauce.

McDonald's has two new sizes of the iconic Big Mac: The Grand Mac and the Mac Jr.

The Big Mac sandwich was invented in Uniontown, Pennsylvania in 1967 by a McDonald's Owner/Operator, Jim Delligatti. It was originally sold for 45 cents. Today, the Big Mac is sold in more than 100 countries.

The Grand Mac and Mac Jr. are available for a limited time.