Sidenote on wine pricing, heard on the radio: in Europe, the cost of everything but the contents of a bottle of wine is about €2.50 (or a bit higher). That covers the glass, the label, transport, branding of the chateau, etc.

Corollary: the wine in a €4 euro bottle is 3x as expensive as the wine in a €3 bottle €1.50 vs €0.50).

That broadcast was a while ago, so the details might not be exact. But the main point is that after the first (about) 3 euro, you're starting to spend money on the contents. Before, you're literally paying a few pennies for the wine...