Our pottery is safe to use in domestic and commercial dishwashers. It is also safe to use in microwave ovens, but the dishes must not be empty. Our tableware pieces are not intended for use as cooking vessels and should never be exposed to heating from only one side, e.g. hob, BBQ, grill or flame. Please avoid placing cold items in hot dishes and never transfer pieces from the freezer to an oven or microwave. Very hot pieces should not be placed on cold surfaces or into cold water.