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[30-Second Curiosity] Today's Pointless Wonder!
금이아빠s
2025. 6. 6. 10:08
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We deliver today's most useless yet intriguing question in a short 30-second video.
- Why double paper cups for hot drinks?
- Not just fancy — it’s science!
- A thin layer of air forms between cups
- That air blocks heat from reaching your hand
- Same trick used in thermos bottles and winter coats
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