Well I've been trying to drink only water for the past couple days but I have slipped in a couple glasses of diet sprite. I always drink lots of liquids, just not water. When i say "lots", I mean about 3-4 liters of diet soda a day.... so it's kinda hard to switch completely over to water. I'll probably try putting a couple lemon slices in it to flavor it up a bit, but i'm still gonna need to sneak in some bubbly drinks