Abstract: Generally, the present invention relates to medical devices and more particularly to an computer controlled bottle system for example, for a preterm infant oral feeding. An embodiment of the invention is directed to a method for delivering nutritional fluids orally to a preterm infant comprising the steps of measuring the infant's inspired breath to breath amplitude, measuring the infant's intraoral sucking pressure, establishing threshold values for infant's inspired breath to breath amplitude and infant's intraoral sucking pressure, and delivering nutritional fluids to the infant only when the infant's inspired breath to breath amplitude and infant's intraoral sucking pressure both simultaneously satisfy their respective threshold values.