The Hidden Purpose Behind That Little Dent
A Purposeful Design
The small dent on a plastic milk jug is not a defect but a deliberate feature rooted in smart engineering.
It shows how everyday objects often hide thoughtful design choices that improve function and safety.
Pressure Control
The dent acts as a “flex zone,” allowing the jug to expand and contract as milk pressure changes.
This prevents bulging, cracking, or leaking, especially during temperature shifts.
Impact Protection
The indentation also works like “a miniature airbag.”
When a jug is dropped, it absorbs shock and lowers the chance of spills,
adding resilience to a frequently handled container.
Sustainability and Recycling
By adding strength with less plastic, the dent supports sustainability and lowers production costs.
It also creates a weak point that makes jugs easier to crush, improving recycling efficiency and reducing energy use.
