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. The plastic lid snaps on tightly, keeping your food fresh in the refrigerator and convenient for you to carry cupcake muffins.3. The mini cupcake liners is suitable for microwaves, ovens and refrigerators. It is perfect for party, birthday, children's birthday, wedding, Christmas, Halloween, etc. With a disposable fork spoon, it is easy to enjoy delicious desserts!4. Allow the cup to cool before putting the lid on. The lids are tightly connected, please separate them when using!