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Flask was moulded in such a way as to keep things hot. That has been the way it was designed.
added by 1001277811 134 days ago 1    0

Now this is real science. I was taught that its that vacuum that helps the vacuum flasks to keep things at their respective temperatures. If you fill it with a hot fluid it will remain hot and if you fill it with a cold one it will remain cold.
added by Anonymous 620 days ago 2    0

Why does the mechanism of a flask work by keeping hot things hot
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Others may say it's because a flask has the vacuum. How does the vacuum keep things hot.
Can this technology be applicable to other ways of keeping ripe things ripe without getting rotten or getting more ripe.
This would be made to keep the ripe bananas or ripe fruits to remain ripe for more months without getting spoiled.

How do you vote?

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I think it is a challenge to keep ripe bananas unripe for many months because that changes their chemistry and can create change in molecular and biological structure.
added by Anonymous 442 days ago 1    0