Imo some of the liquid IVs taste sweet enough, and some like golden cherry are even a touch sour, I love the taste of the ones I've had so far (which is only the aforementioned and the passion fruit one.) They do have Stevia leaf extract though. Honestly the bottled pedialyte is almost too sweet for me, and the powdered stuff is ok but for taste alone I definitely prefer the liquid 4. For hydration I'm still curious but I don't have any pedialyte powder to compare ratios, though I do have an old bottle of the pre-bottled one, and that seems to have similar proportions of Na and K.