Speaker 1: Audible dot com is the leading provider of digital audio
Speaker 1: books and spoken word, with over one tho titles to
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Speaker 1: you sign up today. Welcome to brain Stuff from how
Speaker 1: stuff works dot com where smart Happens. I am Marshall
Speaker 1: Brain with today's question. Why is there a small hole
Speaker 1: on the top of many spray can lids? For example,
Speaker 1: if you have a can of PAM in the kitchen,
Speaker 1: the cap will have a hole in it. These little
Speaker 1: holes are a good example of a feature built into
Speaker 1: a product so that it can handle some kind of
Speaker 1: unusual or unexpected situation. We don't think about or see
Speaker 1: these situations in normal use of the product, but the
Speaker 1: feature is there to handle them when they pop up.
Speaker 1: With a can of PAM, the lid fits very tightly.
Speaker 1: If the manufacturer puts the caps on the cans in
Speaker 1: New Jersey and then ships the cans to Denver, which
Speaker 1: is called the mile High City for a reason, a
Speaker 1: funny thing happens. The air pressure inside the lid pops
Speaker 1: the lid right off, so the poor stock boy at
Speaker 1: the grocery store has to put the lids back on
Speaker 1: thirty cans before you can put them on the shelf.
Speaker 1: It's a total pain. By putting a small hole on
Speaker 1: the lid, the eric and exit through the hole and
Speaker 1: the lids stay on during shipping. For more on this
Speaker 1: and thousands of other topics because it how staff works
Speaker 1: dot com. Audible dot com is the leading provider of
Speaker 1: digital audio books and spoken word, with over one titles
Speaker 1: to choose from. Audible lets you listen to your favorite
Speaker 1: books anywhere, anytime. Go to audible podcast dot com slash
Speaker 1: stuff Brain to get a free audio book download of
Speaker 1: your choice when you sign up today.