This glass is made of melamine, which is practical, resistant, durable and absolutely essential for your daily life, for parties, picnics and much more - and perfect for both indoor and outdoor use. In RICE we spend many resources keeping up with the latest rules and regulations on food safety and sustainability. Therefore, we make sure that our melamine is of the best quality, reusable and free of bisphenol A and phthalates: we love this material and the many possibilities it offers. RICE melamine is super practical ... it is of high quality, resistant and long lasting. It goes to the dishwasher again and again ... Melamine products are not suitable for the microwave.