The slow cooker.

A slow cooker, also known as a Crock-Pot, or Slo-Cooker, (trademarks that are often used generically in the US-Canada and Australia, or UK, respectively), is acountertop electrical cooking appliance that is used for simmering, which requires maintaining a relatively low temperature compared to other cooking methods (such as baking, boiling, and frying)^[1] for many hours, allowing unattended cooking of pot roast, stew, and other suitable dishes.