McDonald’s Free Bottle of Big Mac Special Sauce at Selected Locations and Online – January 26, 2017, US

“To help kick off the debut of the new Mac Jr. and Grand Mac, McDonald’s will be giving away 10,000 limited edition bottles of Big Mac Special Sauce to some lucky fans.”

http://news.mcdonalds.com/US/news-stories/2016/McDonald-s-USA-to-Give-Away-10-000-Limited-Edition