A drinks brand can look completely different from one year to the next while the liquid stays identical. The asymmetry is structural: packaging is fast and cheap to change, and the product is neither.
Changing the liquid is slow and risky
An aged product cannot be reformulated at short notice, since any change has to pass through the maturation period before it reaches a bottle.
Even an unaged product requires reformulation, testing, regulatory checks and a production changeover across every facility making it.
The larger risk is that existing customers notice, since a recognisable taste is the asset a returning buyer is paying for.
Packaging is the only variable evaluated before purchase
A shopper standing in front of a shelf cannot taste anything, so every judgement is made from the bottle, the label and the price.
That makes the package the entire basis of a first purchase, and the product itself only relevant to the second one.
Producers allocate design effort accordingly, which is why so much attention goes to something that is discarded once the bottle is open.
Shelf position is competed for visually
Retail shelves are crowded and a bottle has a very short window to be noticed at all.
Height, colour contrast against neighbours, and an unusual silhouette all improve the odds of being picked up, independent of what the label says.
This drives a slow inflation in bottle size and weight that has no bearing on the contents, and it carries a real freight cost.
Redesign signals change without requiring it
A brand that wants to be seen as modern, premium or sustainable can communicate all three through packaging alone.
Lighter glass and simplified labels genuinely reduce material use, and they also read as a change in the product when nothing has changed.
Distinguishing the substantive redesigns from the cosmetic ones requires looking at what the bottle weighs and what it is made of rather than at what it says.
The risk is losing recognition
Buyers locate a familiar product by shape and colour rather than by reading, and a redesign that removes those cues makes the bottle temporarily invisible to its own customers.
This is why redesigns usually retain one strong element, often a colour or a silhouette, while changing everything around it.
Producers that have changed too much at once have had to reinstate elements of the previous design, which is the clearest evidence that packaging is doing recognition work rather than decoration.