True story relating to water weight.. and just to show you all some extremes and how uninformed my gen is or was..
When Diet Coke came out in 1981 I started drinking it which is when my weight slowly started going up in retrospect. I am sure now it was water weight. The bodies reaction to this chemical.
Anyhow, I drank nothing but Diet Coke almost exclusively until about 2002. I mean nothing all day and all night for over 20 years but diet coke. I even had a 12 pack in the car. I know crazy. We didnt know better.

I mean I knew it was odd but i was raised on soda so figured diet soda would be ok.
In those days there was no bottled spring water but maybe one brand in the back of the store cooler. Noone drank it. We all drank pop mostly.
In 2002 I literally began to taste formaldehyde inside me. A by product from the digestion of aspartame I learned and finally woke up.
I quit cold turkey and drink tap or bottled spring now exclusively.