9 months baby can have water with a glass of; sipper. Always keep the sipper in front and reachable .. thirst is something which can't be expressed easily.. even if u baby is we generally end up feeding the baby . So inculcate the habit and keep repeating have water.. so baby gets trained that way.

Half liter to one dear .mi have seen some babies drink more water while others less..<br> Also differs from summer to winters.;