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Beer Facts: Crores of people around the world drink beer. But have you ever noticed why there are only 21 stripes on the cap of a beer bottle? Believe me, even the drinkers would not know about this. In fact, behind the exactly 21 stripes on the cap of every beer bottle lies William Painter’s discovery in 1892, engineering secrets and 130 years of history.
Many of us have the habit of drinking beer. Beer is drunk by opening the cap of the bottle with the opener or by removing the cap from the bar. But have you ever noticed that there are exactly 21 stripes on the lid? Surely you might not have noticed, because the person who wants to drink thinks about what is inside the beer bottle and not about the beer bottle cap.
Always think twice before opening a beer bottle. You will be surprised to find that there are exactly 21 stripes on the cap of any brand of beer bottle. This is not just a coincidence, there is a special history and technology hidden behind it.
This 21 stripes design is approximately 130 years old. This crown cap was discovered in 1892. This interesting thing was shared by a digital creator through Instagram. This lid was invented by an inventor named William Painter. He was also the founder of the Crown Cork Seal Company of Baltimore.
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The engineering secret behind the 21 stripes..: William Painter experimented with the number of stripes to design the lid to trap the beer and retain fresh bubbles (carbonation). If there were less stripes on the lid, its seal would leak and release carbon dioxide.
Similarly, if too many strips were added, the lid would become brittle and break. After many attempts, he realized that the correct balance was possible only on the number of 21 stripes.
Having 21 stripes makes the lid strong enough to withstand the pressure of the carbonation inside. It also remains simple to open easily with a bottle opener. This number 21 helps in making a stable grip on the bottle cap as per mechanical principles. Some lids were initially made with 24 strips, but they would get stuck in automatic filling machines, disrupting production. With this the 21 stripes design became an international standard.
130 years of engineering heritage…: Even after 130 years of this amazing discovery by William Painter, every beer company in the world is adopting the exact same 21 stripes design. So the next time you open a beer bottle, remember that it’s not just a metal cap but the wisdom of William Painter and 130 years of engineering history.
