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Have you ever wondered why there’s a circular dent on the side of your plastic milk jug? It’s easy to overlook, but this small feature is actually an ingenious piece of design that serves multiple important purposes.
Why Is There a Dent?
✅ Pressure Absorption
The dent allows the jug to expand outward if the contents freeze or if the jug is dropped. This helps prevent the plastic from cracking or splitting.
✅ Structural Stability
It reinforces the container, making it sturdier and less likely to collapse when stacked or handled.
✅ Volume Compensation
As milk is poured out, the dent can flex slightly, helping maintain internal pressure and preventing the jug from sucking in too dramatically.
If You’ve Noticed Two Circles Instead of One, Here’s Why:
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