Abstract: The present invention is addressed to providing an infusion administration container which is effective in establishing about a normothermic temperature of a physiologic solution for its infusion into an animal, such as a human medical patient. The infusion administration container comprises an upper flexible bladder adapted to contain at least one first chemical agent and a first lower flexible bladder adapted to contain at least one second chemical agent. These first and second chemical agent(s), when combined, result in an exothermic reaction. A passageway interconnects the upper bladder and first lower bladder with manually openable closure means disposed within the passageway to separate the chemical agents until the closure means is opened. A second lower flexible bladder, adapted to contain an administrable physiologic fluid, is disposed in heat-exchange relationship with the first lower bladder.