A thermos bottle will keep hot liquids hot and cold liquids cold . BUT HOW DOES IT KNOW?
by 
uncacal
ANSWERS: 4
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a vacuum...i think
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It keeps it the tempterature it was when you put it in.
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hahaha. Artificial Intelligence. It is the first step by Cyberdyne to create Skynet. Judgement Day is coming.
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When the liquid is poured-in it comes it feels its heat of coldness.
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