The present invention provides a device for washing, sterilizing, dispensing metered doses of water and infant formula into, and closing baby bottles. A baby bottle includes a bottle body (124), a nipple (123), a nipple cap (122) and a bottle cap (121). The device is capable of automatically washing the baby bottle, nipple, nipple cap and bottle cap. The device also automatically sterilizes the bottle and its components, assembles the nipple, nipple cap and the bottle cap and dispenses water and metered doses of infant formula in the bottle. The device also automatically closes the baby bottle with the preassembled components, after filling it with the required amount of water and formula at the required temperature.