Everyday Explained: The Reason Behind the Tiny Hole in Your Pen Cap
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Everyday Explained: The Reason Behind the Tiny Hole in Your Pen Cap
Discover the design reason behind the tiny hole found in pen caps.
You may have used countless pens without ever questioning the tiny hole in their caps. However, that small opening serves as a carefully considered part of the design.
Source: Hindustan Times - Theatre & Drama
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