My kids range from 10 to 5, and they've all had coke, and cups of tea before. Kameron was 4 when he had his first coke from Hungry Jacks, so the watered down variety. They've never had a whole can of proper coke to themselves, but they have had a glass of coke (usually 3/4 full) when we've ordered in pizza. They all have had cups of tea from 4/5 years old, but that is once in a blue moon. The two older ones will ask for it more in the winter. I flat out refuse to let them have any sort of energy drink.