At first glance, it might seem like a minor quirk of design or just a
random byproduct of plastic molding, but that small, circular dent on
the side or bottom of your milk jug is anything but arbitrary. In reality,
it’s a clever and purposeful piece of engineering—an unassuming feature
that plays a surprisingly big role in making your milk container functional,
safe, and even eco-friendly. This little indentation, often overlooked,
is a multitasker. It helps manage pressure changes caused by temperature
shifts—think expanding gases when milk is transported or stored.
It also acts as a shock absorber if the jug is accidentally dropped
