Classic Essentials insulated casseroles are designed to keep your food hot and fresh for long hours. It is designed with an inner stainless steel container. It has a simple and functional lid for easy use. The casserole is made from high grade and durable material. Steaming-hot food can be kept fresh for long periods of time in the Classic Essentials casserole. This vessel is made using stainless steel, which gives it a high level of durability and strength. It has an inner and outer layer of stainless steel along with a middle layer of insulative material, which helps to keep the food warm for longer durations. The high-efficient thermal insulation is the reason for the thermosteel branding seen on the outer part of the casserole.