Made with food grade silicone. BPA free, no odor, safe useMicrowave safe, freezer safe, oven safe, temperature up to 446 degrees F, and dishwasher safe. Sturdy and flexible cupcake holders, compatible with most muffin pansNon stick and Reusable; the cupcakes pop out easily with good shapes, very easy to clean. it can be used for thousands of times, good for environment alternative to disposable paper cups, and save money for you