Abstract: The structure of the present invention comprises a self-cooling container in which a segregating wall is used to divide the container into a beverage chamber and a cooling chamber, the latter having a reaction chamber mounted therein, which in a preferred embodiment is of an elongated cylindrical shape. The reaction chamber cylinder of the present invention provides an inverted funnel-shaped bottom surface for receiving the flow of beverage from the beverage chamber portion of the container through a feed-through at the bottom of the segregating wall thereof. The funnel leads to a flow tube which is positioned in axial alignment with the cylinder, preferably through the center thereof and defining an inner wall of the reaction chamber. The reaction chamber houses a combination of chemical materials separated by a readily broken sealing device from a selected volume of distilled water, which rfeleased into the chemical constituents, initiates an endothermic reaction which extracts heat from the beverage.