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"By creating a whirlpool inside the bottle, you’ve set up a corridor of air connecting the inside of the bottle with the outside air."

It didn't appear to me that the small vortex in the video actually reached all the way down to the mouth of the bottle.




It didn't when she still had her hand on it, but as soon as the water began to drain, the funnel/vortex immediately connected the mouth with the air pocket at the top.


I think you are wrong.




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