Abstract: A disposable bottle for feeding babies using powdered or concentrated formula is presented. In exemplary embodiments according to the present invention, a bottle can be pre-filled with filtered water and has a neck opening that can fit nipple rings manufactured by numerous popular manufacturers. In such exemplary embodiments the disposable bottle can have a measurement indicator on its side which indicates the amount of liquid, in ounces and milliliters, associated with a given height on the bottle. In exemplary embodiments according to the present invention a disposable bottle can be filled with fluoridated water to a predetermined level, thus leaving a predetermined volume of the bottle empty and available for mixing concentrated or powdered formula. In alternative exemplary embodiments according to the present invention a disposable bottle can be packaged with a pre-measured amount of powdered formula in a sealed pouch.