Britons guzzled their way through an astonishing 6.97bn litres of soft drinks last year. According to Britvic’s Soft Drinks Review 2013, all that liquid equated to £7.21bn-worth of sales through grocery and impulse outlets. Impulse outlets accounted for nearly 25% of value sales (£1.78bn), up 1.6% on 2011, with ’glucose ...