Vintage Teal Tupperware Stacking Pizza Keeper/Pizza Slice Holders set of 3

These are hard plastic (acrylic?). not your typical Tupperware plastic, lid material is typical Tupperware. Great keep fresh storage for those left over pizza slices! 'Keep N' Heat'. 3 levels - good for saving refrigerator space. Two of these have lids. They are designed to be stackable. Each individual container is approximately 9 inches in length x 7 inches wide at widest point x 2 inches tall. The containers and lid easily snap together. Two lids and three stackable containers. From my research these appear to be vintage. And very good used condition. Minor signs of wear.