What is it for and why is the bottom of the wine bottle concave?

The concave bottom of the wine bottle serves several purposes:

1. Bottle Strengthening: The concave shape of the bottom of the bottle helps make the bottle stronger and sturdier, as the pressure of the air and liquid inside is distributed evenly across the surface of the bottle.

2. Sedimentation: During the aging of the wine, the sediments are deposited at the bottom of the bottle. The concave shape of the bottom of the bottle helps collect and hold these sediments, preventing them from mixing with the wine when it is poured.

3. Improve oxygenation: during the production and transport of wine, the concave shape of the bottom of the bottle helps to maintain a small amount of air between the wine and the cork, allowing a slow and gradual oxygenation of the wine. This can improve the flavor and aroma of the wine, particularly for more structured red wines.

In summary, the concave bottom of the wine bottle has several important functions for storing, transporting and tasting wine.