Confusing Osmosis: Why Hot Milk Tastes Like Water

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spiffing_abhijit
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When a closed jar of hot milk is dipped in a cool solution and tasted after some time then why does it taste like water at the bottom.
 
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I've never experienced this phenomena, but a glass jar is not permeable, so it wouldn't be osmosis. It could simply be that heating the milk forces the milkfat out of solution/suspension.