Casabella Standard Muffin Cups Made from highest quality FDA approved food grade silicone. Freezer to oven safe from -58 degrees F (-50 degrees C) to 500 degrees F (300 degrees C). Great for making muffins, cupcakes and frozen treats. Can also be used as candy or snack cups Silicone resists stains and odors; Non-stick micro textured surface Freezer, refridgerator, oven and dishwasher safe