A sterilizing apparatus for sterilizing a feeding bottle assembly for a baby, the feeding bottle assembly comprising a feeding bottle, a top end and a base end, the top end having an open neck the sterilizing apparatus comprising a housing which is adapted to attach to and sit on the top end of the bottle, an ultraviolet (UV) light source on the housing which extends into the bottle for UV sterilization of the bottle when the housing is attached to the bottle, and a switch which automatically switches on the UV light source when the sterilizing apparatus is attached to the bottle.
