Melamine from Marine Business is unbreakable and very light . The dishes can be used on board every day and are always comfortable . The regatta design with the flags is available in round and square shapes. All dishes are shaped so that they can be easily stacked . The round plates, bowls and cups have a non-slip ring so that the dishes stay on the table even when they are in place. Glasses, cutlery and place mats in regatta design are also available .