An insert for a waterless portable heating device can include multiple containers or shelves arranged in layers for insertion into the device. For example, the insert can have multiple compartments to heat multiple separate ingredients at the same time, e.g., without the ingredients touching each other.

A waterless portable precision heating device includes an ingredient container to contain a food-related, a health-related, or a crafting-related ingredient; a thin heating element configured to surround and contact the ingredient container; an insulation layer configured to surround and contact the heating element; an outer shell surrounding the insulation layer; a lid that encloses the product container and fluidly seals it from the environment; at least one sensor configured to detect the temperature of the device; and a circuit board with a controller that controls the heating of the heating in response to signals received from the at least one sensor indicating whether the product container has reached a threshold temperature.

A waterless portable precision heating device includes an ingredient container to contain a food-related, a health-related, or a crafting-related ingredient; a thin heating element configured to surround and contact the ingredient container; an insulation layer configured to surround and contact the heating element; an outer shell surrounding the insulation layer; a lid that encloses the product container and fluidly seals it from the environment; at least one sensor configured to detect the temperature of the device; and a circuit board with a controller that controls the heating of the heating in response to signals received from the at least one sensor indicating whether the product container has reached a threshold temperature.

A waterless portable precision heating device includes an ingredient container to contain a food-related, a health-related, or a crafting-related ingredient; a thin heating element configured to surround and contact the ingredient container; an insulation layer configured to surround and contact the heating element; an outer shell surrounding the insulation layer; a lid that encloses the product container and fluidly seals it from the environment; at least one sensor configured to detect the temperature of the device; and a circuit board with a controller that controls the heating of the heating in response to signals received from the at least one sensor indicating whether the product container has reached a threshold temperature.

A waterless portable precision heating device includes an ingredient container to contain a food-related, a health-related, or a crafting-related ingredient; a thin heating element configured to surround and contact the ingredient container; an insulation layer configured to surround and contact the heating element; an outer shell surrounding the insulation layer; a lid that encloses the product container and fluidly seals it from the environment; at least one sensor configured to detect the temperature of the device; and a circuit board with a controller that controls the heating of the heating in response to signals received from the at least one sensor indicating whether the product container has reached a threshold temperature.

An insert for a waterless portable heating device can include multiple containers or shelves arranged in layers for insertion into the device. For example, the insert can have multiple compartments to heat multiple separate ingredients at the same time, e.g., without the ingredients touching each other.

An insert for a waterless portable heating device can include multiple containers or shelves arranged in layers for insertion into the device. For example, the insert can have multiple compartments to heat multiple separate ingredients at the same time, e.g., without the ingredients touching each other.

A waterless portable precision heating device includes an ingredient container to contain a food-related, a health-related, or a crafting-related ingredient; a thin heating element configured to surround and contact the ingredient container; an insulation layer configured to surround and contact the heating element; an outer shell surrounding the insulation layer; a lid that encloses the product container and fluidly seals it from the environment; at least one sensor configured to detect the temperature of the device; and a circuit board with a controller that controls the heating of the heating in response to signals received from the at least one sensor indicating whether the product container has reached a threshold temperature.

A waterless portable precision heating device includes an ingredient container to contain a food-related, a health-related, or a crafting-related ingredient; a thin heating element configured to surround and contact the ingredient container; an insulation layer configured to surround and contact the heating element; an outer shell surrounding the insulation layer; a lid that encloses the product container and fluidly seals it from the environment; at least one sensor configured to detect the temperature of the device; and a circuit board with a controller that controls the heating of the heating in response to signals received from the at least one sensor indicating whether the product container has reached a threshold temperature.

An assembly of a liner and a flange for a vertical furnace for processing substrates is provided. The liner being configured to extend in the interior of a process tube of the vertical furnace, and the flange is configured to at least partially close a liner opening. The liner comprising a substantially cylindrical wall delimited by the liner opening at a lower end and closed at a higher end and being substantially closed for gases above the liner opening and defining an inner space. The flange comprising: an inlet opening configured to insert and remove a boat configured to carry substrates in the inner space of the liner; a gas inlet to provide a gas to the inner space. The assembly is constructed and arranged with a gas exhaust opening to remove gas from the inner space and a space between the liner and the low pressure tube.