ClipArt ETC
A slow cooker consists of a lidded round or oval cooking pot made of glazed ceramic or porcelain, surrounded by a housing, usually metal, containing a thermostatically controlled electric heating element. The lid is often transparent glass and is seated in a groove in the pot edge; condensed vapor collects in that groove and provides a low-pressure seal to the atmosphere.

Steam Cooking Vessel

A slow cooker consists of a lidded round or oval cooking pot made of glazed ceramic or porcelain, surrounded…