This set is made from high quality heat resistant glass. It is composed from 5 pieces and is very practical and ideal for both classical and microwave ovens. It is easy to maintain, it can be washed in the dishwasher. Furthermore it is also used for storing food in the refrigerator. It is used for baking, stewing and roasting. The advantage of the glass baking pans and bowls is that you can watch the baking process without opening the pan. It is approved for contact with food both in household and professional premises. All products are controlled according the Health and Safety regulations of Czech Republic by the independent controllers. The products are made from glass containing no Cadmium or Lead. Please cool down slowly. Please do not use any abrasive cleaners for cleaning.