The Scientific Reason For That First Watery Glug Of Ketchup

What's the scientific reason for that watery glug that comes out of the ketchup bottle at first? It turns out that this phenomenon happens with many items.
What's the scientific reason for that watery glug that comes out of the ketchup bottle at first? It turns out that this phenomenon happens with many items.

Why is ketchup so hard to pour?

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History and How It's Made: The Gloppy Chemistry of Ketchup

History and How It's Made: The Gloppy Chemistry of Ketchup

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