Milton 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.After cooking, instantly transfer the steamy hot contents without delay and close the lid. Always fill the container to full capacity for longer temperature retention. Keeping it less than full or opening it frequently may reduce heat quickly.