Tornado in a bottle

Today I’m making tornado in a bottle. To do so I just make some circular motion with the upper bottle creating a vortex in the bottle making it to sink down to the lower bottle much faster while the air passes by in the center.

I did this short video while visiting Navet Sience Center in BorĂ¥s, Sweden with my daughter today. A great place to learn about a lot of things.

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