I don't have any set rules. My kids are allowed almost anything if it's a special occasion. but any soft drinks must be watered down to almost no taste, but makes them feel special. They have very very very weak cordial every day almost. Otherwise the water doesn't get drunk. Honestly, it tastes like water with colour in it. No real taste. If I am out at lunch, I will let them pick (it's usually nuggets and chippys from maccas) and they won't eat them without sweet and sour sauce. Go figure. If I duck into a coffee shop, they usually have a baby chino. Umm, I'm pretty flexible with food and drink, but as I said, most of the time they get treats like soft drink maybe once a fortnight. And even then it's pretty much water! hehehe.