Casserole is made of stainless steel both from inside and outside and has PUF insulation to ensure temperature maintenance for longer period. Usage Instructions: Perfect for all type of food products. Fill completely to maintain temperature for longest time. Keep away from children as the content may be hot. Cleaning Instructions: Casserole should be cleaned before and after use. Use sponge instead of brush for cleaning. Wash with hot soapy water after each use and rinse with hot water to avoid odour.