Instead of 'pop' I initially went for sparkling spring water, but goodness it is expensive! Even 'own brands' of unknown source (pun) are about 70p/ltr so I got a SodaStream.
I use tap water because it is 99% pure and once carbonated I get more than 60ltr for about 21p/ltr. Leeds tap water came third in the last nationwide taste test, and Yorkshire Water do not add fluoride, so I am lucky.
I mix it with pure fruit juices, My favourites are pink grapefruit, cherry, and grenadine. Just saying.
