From the gym bunny clutching her mineral water to the secret lemonade obsessive, Brits love their soft drinks. The market is massive; it’s valued at £15.6 billion in the UK alone. The first in a two-part series looks at our thirst for pure H20 and why we are keen on swigging premium drinks.

Coke is addictively fizzy and OJ is a deliciously sweet nectar, especially for kids. How has AquaBall – water with no sugar, artificial colours, flavours or calories – nabbed 2% market share in two short years? What’s in AquaBall’s recipe that makes it such a success?

PepsiCo's Aquafina FlavorSplash brand is being revamped, with products like "zero-calorie, great-tasting" fruit-flavoured sparkling water in colourful bottles. The intention is to appeal to teens, while qualifying as something parents feel good about buying.

In a move to tackle obesity, US schools will have to replace junk food with 'smart snacks' like granola bars and fruit cups in 2014-2015. But can deeply ingrained habits really be changed when a new study shows kids are less likely to choose foods they know are good for them?