I drink a 20 oz. Diet Mountain Dew every morning. I usually nurse it until lunchtime. After that, it's water for the rest of the day. I usually drink 2 liters or more every day.
I don't care for the flavorings that you can add to water. To me, if your water is "good," it doesn't need anything else. We have a water purification system at home, so I recycled several liter-size bottles and I always have fresh, clean water ready to drink.
JusPeachy 
