This is a 3-piece set of Fridge Smart Tupperware in Sunny Yellow, which is no longer available. They are dishwasher safe. There are charts on the side showing storage ventilation needed for particular items. Each container has two vents on one end. These are three different sizes. Small is 4 1/2 cups and measures 6 x6 x3 1/2. Middle measures 9x6x3 1/2. Large is 12x6x3 1/2 and is 8 1/2 cup. From a smoke free home. Excellent condition.