E S Robbins Expandables offer all kinds of possibilities. Their space saving, expandable design makes them extremely useful, suiting them to dozens of uses. The durable construction makes them versatile enough to go from freezer to microwave and then at clean up time, they can go straight to the dishwasher*. They are available in round and square versions and can accomodate storage needs from 1 cup up to 15.5 cups in just six different sizes.