Hi Fairie, be careful with soda water as it contains added sodium. I was annoyed
because kirks was the only one that didn't have it in and now they do
. Schweppes also contain added sodium. I am not sure if if varies from state to state though, so it might pay you to check the labels...also carbonated plain mineral water has it in too!! Bummer!! I hope this helps you..it is not to say don't drink it (as I will have a glass now and then) but just be aware it may make you retain fluid.