Most people have handled a plastic milk jug countless times without giving much thought to the small circular dent on its side. At first glance, it may appear to be a flaw caused during manufacturing or a cosmetic feature with no real purpose. In reality, that simple indentation is an intentional part of the jug’s design. Engineers include it for several practical reasons that improve the container’s performance, durability, and efficiency. It is a great example of how everyday products often contain clever design solutions that go unnoticed.
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