Just how do you differentiate a product like bottled water? It’s an important question when you realise that Americans drink more than 25 billion litres of bottled water a year at prices greater than gasoline. Bottled water sales have risen 50% per person in less than a decade, which isn’t bad for a core product that varies little, and is at least a thousand times more expensive than tap water which is readily available as an alternative. In Europe, water is even bigger business – Western Europeans drink more than half the world’s bottled water. The winning answer to the...