WORKS OUT AT 22p a litre! You'll need 22 Tesco value sparkling waters (£3.90) to mix with if you haven't already got a system in place. This is great for pub owners also! If you have kids this will guarantee regular trips to the dentist.
7L Fanta POSTMIX makes 45 Litres of Fanta £5.99 combined with tesco value water = 22p for a per carbonated litre of FANTA!!!!