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People are freezing hot water bottles to help them sleep in the heat – but not everyone's convinced it's a good idea – The Sun | The Sun
![thermodynamics - Why was water freezing almost instantaneously when shaking a bottle that spent the night outside during a frosty night? - Physics Stack Exchange thermodynamics - Why was water freezing almost instantaneously when shaking a bottle that spent the night outside during a frosty night? - Physics Stack Exchange](https://i.stack.imgur.com/BTOYY.png)
thermodynamics - Why was water freezing almost instantaneously when shaking a bottle that spent the night outside during a frosty night? - Physics Stack Exchange
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