Why do some marker caps have holes in them?

Why do some marker caps have holes in them?

Viral video about why pen caps have a hole stuns social media

Deep Hole Marker for Wide Application: the deep hole carpenter pencil marker can draw on various materials surface like metal, wood, paper and cement,

Hiboom 2 Pack Solid Carpenter Pencils with Pencil Cap and 18 Refills, Long Nose Deep Hole Mechanical Pencil Marker, Scribe Tool with Built-in

SOLA TLM2 Deep Hole Marker Construction Pencil with Built-In Sharpener, Long-Tip Woodworking Pencil, Graphite Multi-Purpose Marker : Office Products

Why do some pen caps have holes? - Quora

HP_4035 BHC Golf Cap Magnetic Marker

Types of Pens: How to Pick a Pen with the Right Ink

Pica Ink Marking Pen - Black (15046)

Viral video about why pen caps have a hole stuns social media

Carpenter Pencil Cap Pencil Holder For Deep Hole Marker Pencil Woodworker Tool