accommodate containers having square corners by means of the plurality of notches 21 each notch 21 is rounded or arcuate and each of the respective side walls 16 and 24 includes an arcuate radius integrally connecting the inside wall surface of walls 16 and 24 respectively with the bottoms of the cavities or receptacles 22 and 23 in this manner maximum heat is transferred from the resistors through the warmer to the interior of the container 11 the warmer 10 may be constructed of modern ceramic material and electric components having a round shape 5 11 16 34 in diameter and 13 4 34 thick the circumference tapers 1 16 34 along the thickness and both top and bottom base members are recessed and have a wall around the circumference the depth of the top cavity or recess is 51 4 34 in diameter and the bottom recess is 43 4 34 in diameter the former has a 3 8 34 radius where the vertical wall meets the horizontal flat section and the latter has a 1 4 34 radius the heating elements are contained within the ceramic base members and consist of resistance heating elements a thermostat control and a fusible link these are arranged in a conventional heater circuit the thermostat is not adjustable but is preset to maintain a 100 u00b0 f temperature a power cord 10 exits one side of the base and terminates with a three pronged grounded plug.