Flavored water for babies and adults!?

i was searching for the ingredients in mio, and if it was safe for babies. i have a 5month old son who is gaining a tremendous amount of weight because he simply does not get full as easily. his dr suggested that we try water for him. (hes already on solids). after fighting with him for a few days he still refused plain water. so i did some research on the new drink enhancer MIO. altho it does have sucralose ( http://www.foodinsight.org/Resources/Detail.aspx?topic=Everything_You_Need_to_Know_About_Sucralose ) which has been proven safe (and cancer free) after bringing all this up to his dr, and her doing some re search herself. she does not see any problem with using a small amount(less than recommended for single serving..1/2tsp per 8 ounces) i use a tiny squirt and he loves it! all the flavors have the same ingredients beside the natural flavors. so they are all cal, carb, sugar, and caf free!! so to answer all the questions out there about flavored water....MIO works great and is safe!!! and i drink it myself, i would never give my son something i thought would hurt him (soda, propel other drinks)