Beer Trivia:Have you noticed the jagged edges on the edge of the beer lid?

If you take a closer look, you will find that the number of these saw teeth is not…

If you take a closer look, you will find that the number of these saw teeth is not much, just 21.


Beer Trivia:Have you noticed the jagged edges on the edge of the beer lid?
Beer Trivia:Have you noticed the jagged edges on the edge of the beer lid?

Because the three points are a more stable way of fixing, at the end of the 19th century, the inventor of the bottle cap experimented with a multiple of three, and found that in 21 sawtooth, it is better to fix it, and then it is not easy to open. A little less will make the carbon dioxide in the bottle run away.

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