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."
Big Mac aficionados aren't out of luck if they cannot attend one of the limited McDonald's today as the brand is also giving bottles of sauce away via a livestream on Facebook, Instagram and Twitter as well as its branded iMessage app today at 2 p.m.
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