The ServeFresh Insulated Roti Server is designed to ensure freedom from roti sogginess! The double-walled PUF insulation retains the nutritive value of the food. And the dome-shaped lid on the casseroles ensure that the condensed steam trickles down the sides and slides below the coaster, without dropping on the rotis / idlis / theplas, ensuring they stay retain the flavour and aroma, and stay perfectly fresh.