The Duck brand Fridge Fresh™ liner with baking soda features patented technology that absorbs and traps leaks and spills before they make their way to hard-to-reach areas below. The liner also has a protective barrier that collects moisture from washed fruit and condensation from defrosting items. The liners make cleaning the refrigerator faster and easier. Just replace when fully saturated. Each pack comes with four 6 x 10-inch perforated sheets to fit any space.