Generic Electric Lunch Boxes

An electric lunch box is a portable container that you fill with food, plug in somewhere > Like at your desk at work), and somewhere between 30 minutes and two hours later, the food inside is piping hot.
Fact, the company that makes the Crock Pot also makes an electric lunch box.
But the most common style is something that more closely resembles a bento box that you plug in, with one or two separate compartments inside.
The food trays are removable with the heating element situated underneath.
The trays themselves are either plastic or stainless steel, and some of them come with their own eating utensils.