McDonald's Big Mac lovers are about to get a treat. McDonald's is giving away 10,000 bottles of Big Mac Special Sauce in conjunction with the release of its Grand Mac and Mac Jr. sandwiches. The Grand Mac has a heftier patty and an extra slice of cheese, while the Mac Jr. is essentially just a single-patty burger with special sauce. Details on how hungry burger lovers can win bottles will be announced Jan. 25. McDonald's chef Mike Haracz tells Mashable that Academy Award nominee Bradley Cooper is at the top of the list to receive a bottle.