Abstract: A portable liquid heating device includes a single service beverage container defining a cavity for a quantity of liquid and a removable electric heating unit disposed in the container to heat the liquid. The heating unit includes a top housing having a radial flange adapted to rest on the rim of the container in spaced relation thereto to vent the container. A rigid, apertured non-metallic shroud extends into the container from the top housing and terminates in an open free end. Spacer means engageable with the container walls surround the shroud means adjacent the flange to center the shroud in the container in spaced relation to the walls thereof. A cyclindrical thermostatically controlled electric heater, shorter than the shroud, extends downwardly from the top housing into the shroud in spaced relation thereto.