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10 Things You Never Noticed About Everyday Items

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Ten household objects have been hiding design secrets in plain sight for years.

TheThings’ video “10 Things You Never Noticed About Everyday Items” pulls apart the ordinary objects sitting in your kitchen drawer, your bathroom cabinet and your car and shows the engineering built into each one. None of it is decoration. Every bump, hole and notch on this list was put there by a product designer solving a specific, practical problem.

The rundown moves fast, covering ten items in one sitting, but a handful of entries stand out because the reasoning behind them is more deliberate than most people assume. The Heinz bottle, the ballpoint pen cap and the drink straw wrapper each get a dedicated explanation, and the video backs up the claims with the kind of detail that makes you check your own kitchen drawer afterward.

• The embossed “57” on a glass Heinz ketchup bottle’s neck is an official tap spot — the company designates it as the sweet spot where tapping frees stuck ketchup instead of smacking the base.
• The small hole at the tip of a ballpoint pen cap is a built-in airway, added specifically so a swallowed cap won’t cause suffocation.
• Straw wrappers are designed to be torn at the top and flipped over the base, so the tip that touches your mouth never gets handled.

The Heinz Bottle’s Hidden Tap Spot

Heinz didn’t stumble into the “57” on its glass bottles by accident. The number sits at a precise point on the neck that the company has designated as the spot to strike when ketchup won’t budge — a far more effective fix than the instinctive palm-slap to the bottle’s base that generations of diners have relied on. It’s a small piece of industrial design hiding inside a number most people assumed was just branding.

The “57” on a Heinz bottle isn’t a logo — it’s the company’s official tap spot for freeing stuck ketchup.

Purpose of Pen Cap Holes

The tiny hole at the top of a ballpoint pen cap looks like a manufacturing afterthought, but it’s a deliberate safety feature. If a cap is swallowed — a common enough hazard with kids chewing on pens — that hole keeps an airway open and can prevent suffocation. It’s the kind of detail regulators and manufacturers built in specifically to reduce choking deaths, not a cosmetic touch.

The Straw Wrapper Trick

The video also breaks down the correct way to unwrap a straw, a habit most people get backwards. Tearing off only the top of the wrapper and leaving the paper bunched at the base lets you push the straw into a cup without your fingers ever touching the end that goes in your mouth. Flip it the other way, as most people do, and the tip that touches your lips is the one that’s already been handled.

Foil Boxes, Padlocks, and Tic Tacs

Beyond the marquee three, the video runs through several more items with the same kind of quietly deliberate engineering. The push-in side tabs on aluminum foil boxes exist to lock the roll in place so it doesn’t slide out and unravel mid-use. Padlocks have small holes at the bottom for drainage and lubrication, keeping moisture from rusting the internal mechanism. And the ridged indentation on a Tic Tac lid is sized to dispense exactly one mint at a time, no matter how hard you shake the box.

Related design breakdowns and lifestyle explainers along these lines tend to draw the same curious crowd that clicks on World’s Largest Challenge!, and viewers who like this kind of everyday-object teardown often end up down the same rabbit hole as the hardest tongue twister.

None of these details change how the objects work — a padlock still locks, a straw still lets you drink — but knowing why the “57” sits where it does, or why that pen cap has a pinhole, means you’ll never look at either the same way again.