McDonald's Is Giving Away Its Big Mac Sauce via Livestreams on Facebook, Instagram and Twitter

10,000 bottles up for grabs

For fast-food lovers, the Big Mac has been a national treasure since McDonald's rolled it out in 1968, and much of the double-burger's success can be attributed to its secret sauce. Today, the chain is giving away 10,000 bottles of the savory condiment at dozens of its U.S. locations to patrons who say the following secret code: "there's a Big Mac for that."