Pen Cap Holes
Yes, pen caps have holes in them. They are, however, nothing to be concerned about! They were actually inserted for a very good cause. When people think, it appears that many of them place pen caps in their mouths. They will be able to breathe even if they mistakenly swallow it!
Pen Cap Holes
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iPhone Camera Hole
Apple has been including three microphones on all of their phones since the iPhone 5. One is near the speaker grill, another is near the camera lens, and the third is near the bottom of the phone. They accomplished this to ensure that no matter how you hold your phone, you can capture the sound.
iPhone Camera Hole
