Infant Feeding device - This device was developed mainly for premature babies. If a small baby ingests too much too quickly, they will get sick and develop an aversion to eating. The infant feeding device has a controlled flow rate that can be adjusted without removing the bottle from the baby's mouth. In addition to controlling the flow rate the baby receives, the device also acts as a positive reinforcement device. The bottle has a zero flow setting which is used for a minute or two before the flow is turned up, teaching the baby to eat, which is not always innate with premature babies.
Below is the link to the site where the product can be viewed:
http://www.bionix.com/Pages/MedFrameset.html?RightFrame=ControlledFlow.html