Why is it possible to loosen steel caps on screw-top bottles by dipping the cap in hot water?
Md Ariful Islam
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Dr. Md Rushad Rahman
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The hot water will cause the cap to expand slightly, making it easier to unscrew it from the bottle. But it's not recommended to hold a glass bottle under hot water, as the change in temperature could cause the glass to shatter, especially if the bottle's contents are very cold.
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