This is a classic example of smart design doing more with less.
A Silent Indicator of Freshness Problems
Interestingly, the flex panel can also act as a visual warning sign.
If milk spoils, bacteria can produce gas inside the jug. This internal pressure may cause:
The circular dent to push outward
The jug to look swollen or misshapen
While it’s not a guaranteed freshness test, a popped-out or bulging flex panel can be a signal that something isn’t right with the milk.
Reducing Plastic Use and Environmental Impact
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