A device for delivering a liquid heated to a desired temperature under pressure in a microwave oven comprises a first chamber adapted to receive and hold a first volume of a liquid, a second chamber adapted to receive and hold a second volume of the liquid, a vapor flow path from the first chamber to the second chamber, and a liquid/vapor flow path from the second chamber to a destination outside of the second chamber. When the liquid in the first chamber reaches its boiling point and at least partially turns into a gas, at least a portion of the gas flows through the vapor flow path from the first chamber into the second chamber, thereby increasing a pressure in the second chamber. The increased pressure in the second chamber forces the liquid in the second chamber through the liquid/vapor flow path and out of the second chamber.

A packaging device including a breathable or non-breathable, microwavable composite film structure in the form of a bag, a tray or other type of container is disclosed. The device may include atmospheric control attributes in the form of microperforations, and steam venting mechanisms in the form of precision cuts or channels. The microperforations may form atmospheric conditions within the device for the storage of perishable and/or respiring food products, and the steam venting mechanisms may regulate the pressure and/or heat within the device during microwave cooking of the food products within.

A microwave reheating container for food including a concave base and a cover. The base and cover both have a core formed of PET sheet material, formed into the appropriate base and cover shapes. The PET cores are crystallized to CPET on their interior. Each core is overmolded on its exterior with TPC capable of injection molding and having greater strength. The cover may include an elastomeric seal about its periphery. The cover may be secured to the base by one or more locking clips.

A microwavable dish having a body with a microwave-absorbing coating. A bottom of the microwavable dish or the microwave-absorbing coating defines or includes a dome portion. The microwave-absorbing coating can be coupled to or formed with the bottom of the microwavable dish. The microwave-absorbing coating provides heat to the body by transforming microwaves to heat. The microwave-absorbing coating can include a plurality of nubs, where each nub has a height and a nub diameter.

A cooking vessel includes a cooking surface and a lower portion positioned below the cooking surface. A first material is disposed within the lower portion and is in thermal proximity to the cooking surface. The first material increases in temperature upon absorption of electromagnetic radiation. A second material is disposed within the lower portion and in thermal proximity to the cooking surface. An electrical current is induced in the second material upon exposure to an electromagnetic field. Both the first material and the second material are configured to heat the cooking surface of the cooking vessel when used in a microwave oven or on an induction cooktop, respectively.

A method of delivering a liquid heated to a desired temperature under pressure in a microwave oven uses a device having first and second chambers adapted to receive and hold, respectively, a first and second volume of a liquid, a vapor flow path from the first chamber to the second chamber, and a liquid/vapor flow path from the second chamber to a destination outside of the second chamber. The first chamber liquid receives less microwave energy per volume than the second chamber liquid receives. The device is placed on top of a receiving vessel and placed into a microwave oven, which is activated until the first chamber liquid boils and at least partially turns into gas, flows through the vapor flow path into the second chamber, and forces some of the second chamber liquid through the liquid/vapor flow path to the destination outside of the second chamber.

The present invention relates to a heating cooker using a ceramic heating element and a manufacturing method thereof, the method comprising: a cooker body preparation step; a heating element material preparation step of preparing any one or more selected from among mill scale, steelmaking slag and magnetite (Fe.sub.3O.sub.4); an inorganic binder preparation step of preparing, as an inorganic binder, a colloidal silica sol having a colloidal silica content of 8 to 30 wt %; a mixing step of mixing 20 to 40 parts by weight of the colloidal silica sol as the inorganic binder with 100 parts by weight of the heating element material, thereby making a heating material paste; an application step of applying the heating element paste to the bottom of the cooker body; and a drying and curing step of drying and curing the heating element paste, thereby forming a solid heating element.

A microwavable dish having a body with a microwave-absorbing coating. A bottom of the microwavable dish or the microwave-absorbing coating defines or includes a dome portion. The microwave-absorbing coating can be coupled to or formed with the bottom of the microwavable dish. The microwave-absorbing coating provides heat to the body by transforming microwaves to heat. The microwave-absorbing coating can include a plurality of nubs, where each nub has a height and a nub diameter.

A microwaveable container for holding food includes a first container, a second container and a lid. The first container has a lower food holding space sized and shaped to hold a first food and a second container receiving space disposed above the lower food holding space. The first container has a shoulder extending outward from the lower food holding space. The second container nests with the first container and has an upper food holding space sized and shaped to hold a second food. The second container is positionable in the second container receiving space of the first container such that the second container separates the first and second foods held in the respective lower and upper food holding spaces. The second container engages and rests on the shoulder of the first container when nested. The lid attaches directly to the first container.

Provided are a rotating structure and a container using the rotating structure, the rotating structure including: a pouch coupled to a container while being wounded around a circumference of the container; and a raw material provided inside the pouch, wherein the raw material expands the pouch by being sublimated or evaporated while being heated, and the container is rotated according to expansion of the pouch, wherein the container using the rotating structure couples the rotating structure to the container storing content therein and having a container shape.