Cold Dome Plastic Lids have a Rigid Structure that Allows Consumers and Operators to Stack Food Containers While Maintaining the Integrity of the Package and Lid. The Top Container Nests on the Lid Below, Reducing Movement that Can Often Cause an Item to Slip or Spill. The Cold Dome Container Lid is Ideal to Cover Cold Solid Foods that Sit Above the Fill Line. The Clear Plastic Material Gives the Product High Visibility for Easy Identification of the Contents. Ridge Design to Prevent Lids from Locking Together When Stacked.