Carlisle's polycarbonate dinnerware is among the most reliable in the industry. They are designed for places where life and economy are absolutely critical such as hospitals, schools, and long term care facilities. These polycarbonate plates are so durable that they have a five year guarantee against breakage. The polycarbonate material resists stains and chipping, while the plates have a scratch-resistant textured surface. Storage space is saved by the dinnerware's ability to be stacked with other polycarbonate dinnerware currently on the market. These dishes are dishwasher safe.