I used to drink a ton of soda using the big bottles to stay supplied until I found out that it caused my kidney stones. Seriously! No stones since I cut WAY back. If you've never had them, you don't know how much you don't want them.
Actually, the 'clear' sodas, ones that don't have that dark coloring like Coke, Pepsi, Dr. Pepper, etc, supposedly don't contribute to kidney stones. Something about the food coloring or some other content I suppose. My proof? There are 8 empty bottles on my desk right now... mind you, those are from last night
through today... but I was at work for 10 hours. A mixture of 24oz and 20oz bottle s for those that are curious. Been doing this since I was 16, I'm well in to my 30s now, no kidney issues.