are you working out? if you are working out hard, then sports drinks are fine midtraining to keep your energy boosted because it does contain carbs and sodium. but if you are planning on REPLACING your water intake altogether with sports drinks, then you may just end up gaining weight, because it contains carbs and sodium.
if you arent a regular water drinker, thats fine, many people out there arent, so i also suggest the 0 calorie flavor packets into water.. if it helps you get your water intake for the day, then all the better.