food-grade silicone, free,, flexible, and Our liners are designed to withstand thousands for time ' usage, totally a money saver Silicone molds are great for baking muffins, cupcakes, and breads, preparing for treats, desserts on a baking sheet, candy making Silicone molds are naturally non stick to make popping out perfectly shaped baked treats a Easy to clean Microwave, oven, refrigerator, freezer and dishwasher safe