This Royal Genware sauce boat conforms To BS4034 For Vitrified Hotelware Quality Standard for durability in use. It's made from specially selected clays for a brighter white to give a great presentation. It's a practical option compared to other porcelain alternatives. The durable glaze prolongs the lifespan of the product and helps improve the stain resistance. Safe to use in a dishwasher, oven or freezer.