Beer Bottle Cap Mystery Uncovered: Why Every Cap Has 21 Edges—130-Year-Old Invention Revealed
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News18 Kannada•01/12/2025
Beer Bottle Cap Mystery Uncovered: Why Every Cap Has 21 Edges—130-Year-Old Invention Revealed
- •Beer bottle caps have exactly 21 edges.
- •The 21-edge design preserves beer's carbonation and aroma.
- •Invented by William Painter 130 years ago.
- •21 ribs provide strength and easy removal.
- •All beer companies use this 21-edge design.
Why it matters: Knowing the cap design helps you understand beer freshness and packaging technology.
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