These Conserveware PET clear plastic flat lids fit our 5oz Conserveware portion cups. They are easily stackable to store and have a perfect tight fit on the souffle cups. These lids are made from recycled PET plastic. By including the highest amount of recycled content, these lids offer some great environmental benefits. For example, because there are fewer virgin raw materials used in each package of lids, you are saving resources for other uses and divert material that was headed to the landfill by repurposing it into a new product, essentially putting it through two or 3 life cycles. Sold in packages of 100.