Where does this come from, and can I check it?

The shape holds pressurised gas while letting the bottle stand upright. The figure is taken from International Organization for Standardization, 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 2,600 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.

Mondo Knows Facts

Fizzy drink bottles have a domed base with feet

The shape holds pressurised gas while letting the bottle stand upright Carbonated drinks sit under several atmospheres of pressure, which would push a flat base outward and rock the bottle. A petaloid base moulds a dome upward in the middle, and the moulded feet around it carry the load. The dome also helps the thin-walled bottle resist the internal pressure without using extra plastic. It sits in Mondo's everyday life collection, one of 200 facts that each trace back to the reference below.

Where this comes from

International Organization for Standardization

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

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Tags: packaging, plastics, pressure

Fizzy drink bottles have a domed base with feet: the short answers

Where does this come from, and can I check it?: The shape holds pressurised gas while letting the bottle stand upright. The figure is taken from International Organization for Standardization, 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 2,600 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.