FunWhy does the bottle of cava have a sunken...

Why does the bottle of cava have a sunken bottom?

In the production of champagne, after the first fermentation of the wine, it is bottled and, among other ingredients, yeast and about 25 grams of sugar are added. The bottles are closed with a special stopper and placed in a horizontal position for the second fermentation to be completed. In this, a significant amount of carbon dioxide is produced , which raises the pressure inside the bottle to about 6 atmospheres. One strategy to avoid its bursting is to modify the base towards a conical shape, which provides better resistance to pressure.

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