Metal muffin molds feature a non-stick coating that eliminates the need for greasing. You don't need paper liners; simply fill the batter directly into the mold – this prevents sticking and ensures all muffins have a uniform shape. The same applies to silicone muffin molds. Thanks to the smooth surface, the baked muffins can be easily released from the mold. The muffin molds can be easily cleaned by hand with a damp cloth or under running water.