This Wedgwood Jasper Conran Pin Stripe Espresso Saucer is made from Fine Bone China. t is perfectly safe to warm your tableware gradually and evenly to 100°c. However, it should never be exposed to direct heat from a naked flame or to rapid changes of temperature. Tableware decorated with metals should not be used in a microwave. All tableware is freezer safe but do not subject any pieces to sudden or rapid changes of temperature.