A system for preparing a nutritional liquid for ingestion by a neonate is disclosed. The system includes a receptacle for sterilizing water for use in warming the nutritional liquid. A sterilizer having an ultraviolet (UV) light source is engaged with the receptacle, and a fluid pump is provided to pump sterilized water from the receptacle and into a sleeve compartment of a warming bag. The sleeve compartment surrounds an interior pocket that is dimensioned to receive a container that is filled with the nutritional liquid. The system also includes a heater/vibrator having a reservoir and a heating element. The reservoir is dimensioned to receive the warming bag and liquid-filled container. When the heating element is activated, heat is conducted from the heating element to the reservoir, from the reservoir to the water, and from the water to the nutritional liquid in the liquid-filled container.
