Keep the water available. Thirst can be quantified. Baby is show u signs he wants water and finally take and drink himself use a sipper.

Yes dear it's ok to store ...it's better if you give boiled water ..if the iOS are dey you can give..else 8 to 10 spoons in 2 hours or so is fine ..

Whenever u feel baby is thirst give some water.. you can store in container or keep on supper bottle of water for baby...