That has persisted long after the pocket watch faded from common use. This is the reality of our modern world: it is built upon layers of intentionality, safety, and historical legacy. Take, for instance, the small hole in the cap of your ballpoint pen. It isn’t there to regulate ink flow or prevent the pen from drying out. It is a life-saving safety feature, meticulously calculated to allow airflow should a child accidentally swallow the cap, potentially preventing a tragic choking incident.