I know I'd be at 250lbs if I still drank soda. I used to pound 3-6 mountain dew bottles a day at the computer (that's 12-20oz per bottle). I stopped and water is delicious and satisfying now. I drink small amounts impulsively now, it's like a fixation. Water is the most delicious healthy thing I consume and thank god for that.
Just tap water, but my state/county has good tasting water and I also have a fridge filter. If the tap water tasted awful, I'd drink less water for sure.