My fiancé ran an experiment at work. Employees at his office get the very nice benefit of several shelves of snacks and a fully stocked drink fridge, and he is in charge of keeping them stocked. Inside the drink fridge, there are three flavors of sparkling water: lemon, lime, and mixed berry. The lime and mixed berry are stocked on the bottom shelf, and the lemon is stocked on the next shelf up with the orange juice. Every few days when he restocks, he notices that much more of the lemon has been consumed than either the lime or the mixed berry. This week, he decided to switch the lemon with the mixed berry, so the lemon was on the bottom shelf and the mixed berry was on the next shelf up. Sure enough, when he went to restock the fridge, mixed berry was the most consumed flavor.
This tells us that people make their decisions of which flavor of sparkling water to drink based on the positioning of the bottles on the shelves rather than the flavor itself.