SAN FRANCISCO (AP) — To get you to come into McDonald's and buy new versions of its Big Mac, the chain is giving away 10,000 bottles of its trademark special sauce for people to use at home. 
 
 The move is to celebrate the introduction of the Mac Jr. and the Grand Mac, two different-sized variations of the classic sandwich. 
 
 The giveaway is a first in the United States. 
 
 McDonald's introduced the Big Mac in 1968. In 1975, the special sauce got its own callout in the signature Big Mac commercial, touting the burger's components_"Two all-beef patties, special sauce, lettuce, cheese, pickles, onions on a sesame seed bun." 
 
 The bottles will be available Thursday at participating locations nationwide. 
 
 Additional details on how and where customers can get their hands on a bottle are expected to be released later Wednesday. ||||| Relaxnews 
 
 
 
 
 
 McDonald's has bottled their iconic 'Special Sauce' in preparation for a giveaway that will hand out 10,000 free bottles of the stuff to promote the launch of their new Big Macs. 
 
 "A new-Mac-Sandwich-sizes party needs epic party favors-like 10k bottles of Special Sauce. Tomorrow find out when/where you might get one!" McDonald's tweeted Tuesday. 
 
 The bottles are expected to be distributed at participating restaurants across the U.S. Thursday. 
 
 After announcing plans to both shrink and inflate their original iconic double-decker sandwich last year, the new Mac Jr. and Grand Mac launch Thursday. 
 
 For those with smaller appetites, the Mac Jr. is a Big Mac, minus the middle layer and second beef patty. 
 
 For bigger Mac attacks, the Grand Mac features bigger beef patties, at a weight of one-third of a pound. 
 
 The launch comes following a dip in sales over the last quarter. In the U.S., sales dipped by 1.3 percent compared to the same period in 2015. The drop is attributed to the strong results seen from their All-Day Breakfast program which launched in 2015. 
 
 The fast food giant is also hoping to resurrect its most iconic sandwich, particularly among Millennial consumers. According to an internal memo obtained by the Wall Street Journal last year, it's estimated that only one in five Millennials have ever tried the company's flagship product. 
 
 Meanwhile, in response to McDonald's tweet announcing the special sauce giveaway, one cheeky follower posted a photo of Kraft's Thousand Island dressing, with the message, "Sweet got mine!!"
– To get you to come into McDonald's and buy new versions of its Big Mac, the chain is giving away 10,000 bottles of its trademark special sauce for people to use at home, the AP reports. The move is to celebrate the introduction of the Mac Jr. and the Grand Mac, two different-sized variations of the classic sandwich. The giveaway is a first in the United States. The bottles will be available Thursday at participating locations nationwide, and the company tweeted details of the giveaway Wednesday. CTV reports that the launch of the bigger and smaller Macs is an effort to attract millennial consumers. A company memo leaked last year estimated that only around a fifth of millennials had ever tried a Big Mac.