There was a moment as a kid when you graduated from Happy Meals to Big Macs. It was akin to becoming a fast food adult. And the thing that made the Big Mac so damn special was the secret sauce the fine folks at the Golden Arches used. Now, if you’re extremely lucky, you can get your hands on a bottle of the stuff. McDonald’s will be selling 25ml bottles at 920 restaurants in Australia for less than a dollar each. For the time being, however, we wouldn’t get our hopes up since each location is only receiving 600 bottles. On top of those 25ml bottles, McDonald’s is offering 200 special edition 500ml bottles with proceeds going to charity. Right now they’re on ebay for close to $20k, and they don’t even come with a toy.