Sedona Express Non-Stick Drying Sheets (BPA free) are coated with a non-stick coating for use with sticky foods. Designed to be used with the open tray to create a flat surface, place a sheet inside the open tray and add your ingredients on the sheet. This is the choice for an economical non-stick surface. However, please note that studies have shown that chemical non-stick coatings may contain small amounts of harmful chemicals.