Abstract: A container adapter for use in feeding human infants and animal infants is shown. The container adapter has an internal threaded portion that can comprise a set of thread segments sized and configured to match the external threads of a commercially available soda or bottled liquid container, and can have an external threaded portion sized to match the internal threads of a standard nipple ring for an infant feeding bottle. The container adapter includes a funnel that provides a user with assistance in inserting infant feeding ingredients into the liquid container by placing the container adapter on the liquid container to use the funnel of the container adapter to place infant feeding ingredients into the liquid container. The container adapter is then inverted and installed onto the liquid container. A nipple within a collar is attached to the container adapter thus converting the liquid container to an infant feeding bottle.