Hay there - well I started offering rooibos when he was about 2 and a half months as he had trouble with his tummy - the tea worked wonders ( tried to avoid the sugar water - only used it in dire situations ( it can cause tooth decay even before the teeth come out ). The trouble I had with him though at aroun 3.5 months was he refused water, tea and we had a very hot feb - started to worry a bit - paed suggested the fruit juice watered down - ( needless to say my little one refused it and still does lol ) the water MUST be boiled - i would buy the purity in the little box( like the liqui-fruit ) it is already mixed with water then you just add it to the cooled boiled water eg work with 60ml's give about 30ml's juice ( already mixed with water ) to about 30ml's cooled boiled water -it will give the water a taste but wont be too sweet