The Pavia 3-piece salt and pepper shaker set is made of rose-colored rimmed stoneware. Stoneware is a clay-based material used in the production of plates and dishes, which is fired at temperatures ranging from 1100-1300 degrees. It is much more durable than ceramics and is less absorbent of water compared to ceramics. Due to being fired at higher temperatures, it can be safely used in a microwave, oven, and dishwasher for many years.