New seal cover design features an inner seal that provides superior spill resistance Designed to seal on the inside radius rather than wrapping around the outside of the pan, the new cover stays secure and tightly sealed, even during transport on the rails of an insulated carrier. The tight fit prevents spills during transport, reducing waste and improving food safety. Polypropylene material is safe from -40?C to 70?C making it ideal for use in coolers and freezers. Warranty 1 year