1. These cupcake cups are made of quality aluminum foil that makes these strong and sturdy. Put them into the oven and bake them directly. No Baking tray is needed. Safe for families.2. Oil proof and non-stick, easy to use with these foil paper wrappers, saving cleaning troubles.3. The mini cupcake mold is suitable for microwaves, ovens and refrigerators. It is perfect for party, birthday, children's birthday, wedding, Christmas, Halloween, etc.4. You can bake the paper mold in the oven directly. No cupcake tray required. Saves time and energy.