Purpose of the Circular Dent on Milk Jugs

Milk has been lying to you.
That innocent-looking jug in your fridge is quietly running a high-stakes safety operation — and the clue is a single, sunken circle in its side. It’s not random. It’s not decorative. It’s a built‑in pressure valve, shock absorber, structural brace, and even a silent spoilage alarm. One tiny dent. Four huge jo… Continues…

That continue reading …