A container 10 for use in a microwave oven for heating a food product includes a base 20 that is substantially rectangularly shaped and includes a lower ledge 22, and a sump 30. First sides 24, and ends 26, extend upwardly from the base. An upper ledge 28, annular to a periphery formed at a top of the first sides and ends extend outwardly therefrom. Second sides 32 extend upwardly from a periphery of the upper ledge substantially perpendicular to a planar surface defined by the base. Outwardly extending flange 40 is formed annular to and along a periphery of the second sides.