All of our items are made from the safest material on the market and are all BPA free. BPA, or bisphenol A, is the chemical used to manufacture the lining of food and beverage cans and polycarbonate plastic products. BPA has been called into question in recent years for leaching into food products when heated. Again, all of our products are BPA free, and have been tested to the highest FDA standards for being able to be labeled as “microwave safe”. So you can use them with complete confidence.