Microwave packaging

A method of heating a food product, comprising:

• obtaining a container comprising a generally circular centerline having an axis and a first diameter, a receptacle comprising a sidewall extending at least partially around a cavity, at least a portion of the cavity extending along at least a portion of the centerline, the sidewall comprising an inner edge and an outer edge each being spaced apart from the axis of the centerline for at least partially retaining the food product in the cavity in proximity to the centerline, wherein the inner edge is generally circular, is generally concentric with the centerline, and has a second diameter;
• positioning at least a portion of the food product in the cavity;
• and
• exposing the container and the food product to microwave energy comprising a wavelength, wherein the first diameter is generally equal to the wavelength of the microwave energy, and has the second diameter is generally equal to at least half the wavelength of the microwave energy.

A package comprising a container holding a food product for heating the food product with microwave energy comprising a wavelength, the container comprising:

• a generally circular centerline having an axis, wherein the centerline has a first diameter that is generally equal to the wavelength of the microwave energy;
• a receptacle comprising a sidewall extending at least partially around a cavity, at least a portion of the cavity extending along at least a portion of the centerline;
• the sidewall comprising an inner edge and an outer edge each being spaced apart from the axis of the centerline for at least partially retaining the food product in the cavity in proximity to the centerline, wherein the inner edge is generally circular and is generally concentric with the centerline, the inner edge has a second diameter that is generally equal to at least half the wavelength of the microwave energy, and the inner edge extends along an inner perimeter of the receptacle and at least partially around the axis of the centerline;
• an inner receptacle disposed within the inner perimeter;
• the food product comprising a primary food item disposed in the cavity of the receptacle and a secondary food item disposed in a secondary container received in the inner receptacle, the primary food item comprising a generally lossless dielectric material and the secondary food item comprising a dielectric material that is relatively lossy with respect to the generally lossless dielectric material, wherein the primary food item is for being exposed to relatively higher microwave energy in the cavity of the receptacle than the secondary food item in the inner receptacle.