The CHEFSPOT Collapsible Silicone Food Storage Containers come in a set of four in mixed sizes: a 40.6 ounce large rectangle, a 27 ounce medium rectangle, a 23.7 ounce medium square and a 16.9 ounce small square. The range of sizes covers full dinners, sides, snacks and cut fruit, and the square and rectangular shapes line up efficiently on refrigerator and freezer shelves. Each food-grade silicone container folds flat when empty to reduce the cabinet space the set occupies. The snap-lock lids have an airtight vent that holds sauces during transport in a bag or lunch box. All four containers are microwave, freezer and dishwasher safe and are made without bisphenol A. Allow hot food to cool before sealing the lid.