Includes two 1¾ qt. Small Deeps, one 1¾ qt. Medium one 1 gal. Medium Deep New in original plastic Storage of fruits and vegetables have been researched extensively by top food scientists from the University of Florida and Tupperware to develop a line of intelligent containers.​ The Tupperware ACE (Atmosphere Controlled Environment) system creates the optimal environment to keep fruits and vegetables fresh longer. VentSmart Containers have a special three-way venting system that helps regulate the atmosphere inside the container by balancing the flow of oxygen coming in and carbon dioxide going out. ​ Slider can be used in 3 different positions.: Half Open: When the slider tab is aligned with the half circle on the pictogram, the small opening in the seal is open for light venting.​ Closed: When the slider tab is aligned with the fully etched circle in the middle of the pictogram, both openings in the seal are closed.​ Fully Open: When the slider tab is aligned with the hollow, glossy circle on the pictogram, the big opening in the seal is open for full venting.​ The handy produce chart to identify the venting slider position is printed within the layers of the refrigerator storage container so it won’t fade or wash off over time.