If you think that little dent on your milk jug is nothing, you’re wrong. It could be the first sign that something is about to go very, very wrong in your fridge. That innocent-looking circle isn’t a flaw — it’s a silent alarm, a built-in pressure valve, a tiny plastic guardian standing between you and a potential mil… Continues… That round indentation on the side of a plastic milk jug is actually a smart safety feature. As milk ages or warms, gases can build up inside the container, increasing internal pressure. The dent is designed to flex outward if that...
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