Beer  

Egyptians invented filtration. 

The Sumerians invented beer however it was not filtered and the malt floated at the surface, so they invented the straw in order to avoid the malt at the surface. Later Egyptians also used straw to drink their unfiltered beer until they invented filtration. They filtered the beer through a basket before drinking. From then on filtered beer didn't require straw.

Considering the value the ancient Egyptians placed on enjoying life, it is no surprise that they are known as the first civilization to perfect the art of brewing beer. The Egyptians were so well known as brewers, in fact, that their fame eclipsed the actual inventors of the process, the Sumerians, even in ancient times...
The Mesopotamian brew in Xenophon's narrative was served in great bowls, and one drank it through a straw to avoid the malt floating on the surface, which was the usual manner of drinking beer in Mesopotamia. The straw, in fact, was invented by the Sumerians specifically for drinking beer. Mesopotamian beer was thick, the consistency of modern porridge, and could not just be sipped...

By the time of the New Kingdom barley and emmer (wheat) were used which were mixed with water to create a mash which was then poured into vats and heated to ferment. This mixture was then strained and different herbs and fruits added for the flavoring of the various types of beer. According to Strudwick, "fermentation of everyday beer took a few days, producing a mixture fairly low in alcohol" and "the outcome was a thick, brothy liquid that had to be filtered through a basket before being drunk". Once strained, the beer was sealed in ceramic jugs and stored, often underground in a process similar to later lagering...
Ancient, Beer in Ancient Egypt, 2017

The Egyptians were the first in the world to filter beer, not Sumerians. First they filtered the beer through a basket before drinking. Later they squeezed beer through a cloth before drinking; same method used today to filter drinking water in poor countries (See: Filtering Water Using Cloth). They used this filtration process on water, beer, wine...

This was only known recently, however this was portrayed in the Quran 1400 years before it was discovered. In the story of Joseph, his jailmate dreamt that he was squeezing alcoholic beverage.

[Quran 12:36] Two youth entered the prison with him. One of them said, "I see myself squeezing alcoholic beverage." The other said, "I see myself carrying bread on my head, from which the birds are eating. Tell us their interpretation-we see that you are one of the righteous."

"Aasur أَعْصِرُ" means squeeze. "Khamr خمر" means any alcoholic beverage, beer, wine, liquor... (wine is "Nabeeth نبيذ" in Arabic but is not used here). In this verse Joseph's jailmate dreamt that he was squeezing an alcoholic drink. Today we know why the Quran used this odd word "squeeze" instead of "serve"; because it is a filtration process. He squeezed the King's drink for filtering.

How could an illiterate man who lived 1400 years ago have known that the King's drink needed filtration?

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