McDonald’s famous Big Mac sandwich has a brand-new look—and to commemorate the occasion, USA Today reports that the burger giant is giving away 10,000 bottles of its "Special Sauce" this Thursday, at select locations.

McDonald’s recently debuted the Mac Jr. and the Grand Mac, two limited-edition sandwiches that are essentially larger- and smaller-sized versions of their namesake. The Mac Jr. has a single patty with cheese (no middle bun layer) and Special Sauce, and the Grand Mac has thicker patties and extra cheese.

"We listened to our customers, who told us they wanted different ways to enjoy the one-of-a-kind Big Mac taste,” McDonald’s chef Mike Haracz explained in a press release.

The Special Sauce giveaway locations won’t be officially announced until Wednesday, January 25, but WTOP News reports that bottles will be handed out to customers on a first-come-first-served basis, if they say the phrase, “There’s a Big Mac for that.”

Contrary to its name, McDonald’s Special Sauce really isn’t that special. In 2012, McDonald's executive chef Dan Coudreaut revealed that the tangy Big Mac condiment is simply a variation of Thousand Island dressing, and demonstrated how to make it at home in a YouTube video tutorial. Still, this public knowledge hasn’t prevented fast food lovers from continuing to enjoy the sauce in-store—or for that matter, from spending $96,000 on a vintage bottle of the condiment.

[h/t USA Today]