10 Design Features Of Ordinary Items That Have Surprising Purposes

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10 Design Features Of Ordinary Items That Have Surprising Purposes

6. Holes In Pen Caps

 

Most think these holes are to keep the ink from drying out, but they’re actually to prevent suffocation if a child accidentally swallows a cap.

7. Bumps Between Tire Treads

The bumps show the minimum height it’s safe to drive on, so if your tire tread wears down to match these markers, it’s time to replace the tire.

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Source: littlethings

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