Why is the bottom of the wine bottle hollow?

The hollow or indented area at the bottom of a wine bottle is called a punt. This feature is commonly seen in many wine bottles, especially for higher-quality wines. There are a few reasons for the punt’s existence:

1. Structural Strength:
The punt helps to reinforce the bottom of the bottle, making it less likely to break or crack. Glass bottles are vulnerable to pressure, especially when filled with liquids. The indentation provides additional strength and stability, particularly in bottles that are under pressure (e.g., sparkling wine like Champagne).
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