If just moving the product has this much effect it shows just how powerful brand perception is and how nuanced it can be. If you're a student of media / propaganda this is a textbook basic example of product placement and its importance.
It may seem obvious but the implications are immense. This kind of insight underpins just about every advertising campaign in some way. This is not a trivial example at all.
This is how lucative having those bottles positioned just so is to these companies. It also says a lot about how persuasive this kind of placement really is.