There's a Reason For Holes on The Tops of Pen Caps, And It's Surprisingly Awesome
Do you know why Pen Caps have holes?
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There's a Reason For Holes on The Tops of Pen Caps, And It's Surprisingly Awesome
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File:BIC blue pen cap.jpg - Wikimedia Commons
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The Little Known Reason Why There Are Holes in Pen Caps
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Plastic Pen Cap - Plastic Ball Pen Caps Manufacturer from Howrah
Why Pen Caps Have Holes in Them - ATTN:
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