[post_page_title]Pen caps[/post_page_title]
That tiny hole on your pen cap is actually not there to keep the ink fresh or flowing somehow (as some people believe). There is a much more serious reason behind this design detail.
The first manufacturers of these types of pens realized the cap could be extremely dangerous if any toddlers got a hold of them. So they made sure to add the hole, so if a lid would ever get stuck in a child’s throat – they would still be able to breathe.
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