Food warmers are specialized kitchen, catering, or portable devices designed to maintain cooked food at safe,, appetizing temperatures (\(>140^{\circ }\text{F}\) or \(60^{\circ }\text{C}\)) without overcooking. Ranging from commercial countertop, chafing dishes to electric portable lunch boxes, they prevent foodborne illnesses by keeping food out of the danger zone. Common types include electric buffet warmers, commercial glass display cases, and portable lunch boxes.