12 Apostles, a Dozen Eggs, and… the 12-Bottle Case?

Why does a case contain 12 bottles? It sounds like a simple question, yet no one knows the answer for sure. The leading theory is practical: The following content is accessible for members only, please sign in.

“The wine one drinks from one’s glass depends on a vast number of thingsThe following content is accessible for members only, please sign in.