opencola
I searched for “lessig” on Google News and found this article at AlterNet, The Great Open-Source Givaway, by Graham Lawton. The article, apart from explaining the open-source movement, tells the story of how at computer expos, shiny cans of a new cola, opencola, were given away. On the can the drinker was told to visit a website for the “source”. The recipe has been removed now, and all you can see at opencola.com is info about “the first collaborative search engine”.
Apparently, the beverage took on a life of its own, and was sold by ThinkGeek. The recipe can be viewed using web.archive.org. There’s also a more kitchen-friendly cola recipe.