The CHEFSPOT Collapsible Silicone Food Storage Containers come in a set of five matching rectangular containers, each holding 27 ounces, or about 3 and one third cups. Because the containers are the same size, they stack evenly in the refrigerator, which suits weekly meal preparation and single-serve portions. Each food-grade silicone container folds flat when empty to reduce the cabinet space the set occupies, which is useful in apartments, dormitories and small kitchens. The snap-lock lids have an airtight vent that holds sauces and dressings during transport. All five containers are microwave, freezer and dishwasher safe and are made without bisphenol A. Allow hot food to cool before sealing the lid.