Mondo Knows Facts

The indented base at the bottom of a wine bottle is called a punt

Concave bottle bases distribute gas pressure and collect natural wine sediment

The concave indentation at the base of glass wine bottles is called a punt. Historically, glassblowers formed punts to push the seam inward so bottles stood upright without rocking. Modern punts distribute internal gas pressure in sparkling wines and capture sediment poured from aged vintages.

Where this comes from

Encyclopaedia Britannica

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

Go further

More facts like this

Tags: glass, wine, packaging

The indented base at the bottom of a wine bottle is called a punt: the short answers

Where does this come from, and can I check it?
Concave bottle bases distribute gas pressure and collect natural wine sediment. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a everyday life fact?
Yes. It sits on the Everyday Life shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?
The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.