I am still breast feeding ds at 21 months and he has stacks of breast milk still. I gave him a sippy cup of water at 6 months and only offered it with meals and that gradually became more and more but water intake prior to 12 months wasn't that much when he was on the boob around the clock. I think at about 16 months he started having other things like lemon water (sipping from a straw from daddys glass) and home make fresh fruit & veg juice when we make them in the morning. I've also given him some organic oat milk but only a couple of times. So he pretty much still only has water and breast milk.