Hi! At 10 months, ang baby mo ay dapat kumain na ng solid foods kaya yung tubig ay naturally nakukuha na niya from wet foods like porridge, fruits, at vegetables, hindi siya kailangan ng maraming inumin tubig pa talaga. A few of us moms just offer sips of water from a cup during meals or snack time para lang sa hydration, pero ang breast milk or formula pa rin ang main source niya. Para sigurado sa tamang amount based sa kanya specifically, better check with your pedia lang para ma-guide ka properly, especially since every baby ay different based sa climate, activity level, at kung gaano siya kumakain ng solids. You're doing great asking!