these measuring spoons are microwave, dishwasher and oven safe and constructed from a ceramic material.They make an ideal addition to any kitchen and include 1/4 teaspoon, 1/2 teaspoon, 1 teaspoon and 1 tablespoon sizes.The Pioneer Woman Fall Flowers Ceramic Measuring Spoons: 4-piece measuring spoon set Microwave safe Dishwasher safe Oven safe