With the introduction of the Mac Jr. and Grand Mac burgers, McDonald's will be giving way 10,000 limited edition bottles of the Big Mac's Special Sauce today.

McDonald's Media Room

The limited edition bottles can be found only at participating restaurants. You can find the special sauce bottles by downloading the Big Mac Special Sauce Finder iMessage app.

Taking a page from the speakeasy book, customers who find the participating store will have to share with a crew member the secret code, which is "there's a Big Mac for that." The bottles are being handed out on a first come, first serve basis.

According to a McDonald's news release, there will be one store in Colorado participating in the Secret Sauce giveaway, at

1195 South Colorado Blvd, Denver, CO 80246

But, you can also try to win a bottle by following McDonald's and participating in their live giveaway on Facebook, Instagram, or Twitter.