4 bottles of 550ml or 2.5 bottles of 550ml.

To cook rice porridge, you can use 4 bottles of 550ml mineral water, a total of about 2200ml of water. This ratio applies to food quantity and taste requirements. If you eat less or want the rice porridge to be thicker, you can consider reducing it to about 2.5 bottles of 550ml water, for a total of about 1350ml of water.