Airtight: The airtight, breathable lids on these containers keeps food fresh for longer. | Stackable: Their modular design makes them stackable, saving space in your kitchen or fridge. | Easy Open: Convenient, large tabs on the lid allow for easy opening. | Easy Clean: Smooth finish on inside walls makes the containers easy to clean. | Material and Capacity: The Cubix are made of plastic and have a capacity of 110ml each.