This loaf form is made from high quality borosilicate glass SIMAX. It is suitable for baking cakes and storing in the fridge. The glass form gradually release heat for the best baking results.It is resistant to temperatures between -40° C to +300° C. It is approved for food contact both in household and professional premises. It is easy to wash and microwave and dishwasher safe. It is controlled according the Health and Safety regulations of Czech Republic by an independent authority. It is made from recyclable glass containing no Cadmium or Lead. Please let it cool down slowly and wash with non abrasive materials.