Why not fizzy? I love fizzy water

Fizzy is ok but doesn't absorb as well - and all those bubbles make you gassy...one thing most if my clients are trying to avoid.
True discussion with client
Client "I am really bloated and always gassy"
Me "Do you think the 2 litres of coke you are drinking on a night time has anything to do with it?"
Client "No. I'm wondering if I'm intollerant to a food and it makes me bloat..." dear God....
Why not fizzy? I love fizzy water

and why not flavoured?
The body wants it pure - so when it's flavoured it has to extract the flavour before it can let it run around in the body and be absorbed.
Do you really want the cells that are 'working' you running on orange squash? Plain water ftw!!