These new Freezer Mates make organizing any freezer much easier. Each container has rounded corners and a recessed bottom that allows maximum airflow for faster, more efficient freezing and thawing. The flexible containers and seals ensure easy removal of frozen foods. This is a set of 4 smaller sizes, 2 with 2 3/4 Cup capacities and 2 with 1 Cup capacities. The seals are in this new "Purplicious" lavender color, and they have the Classic sheer transluscent base with a clear window for easy viewing.