These cupcake liners are made of silicone, which is not only time-saving, but they are also non-stick so they eliminate the need for greasing and flouring the muffin pans. All you have to do is place the silicone liners in the muffin pan and fill them with batter. To serve, easily remove the cupcakes from the liner. In addition, these reusable cupcake liners are more environmentally friendly than paper liners.