Rubbermaid Collapsibles Food Storage Container, 2 1/2-cup (NIS0007169123913) Collapses to a 1-inch height so it takes less space, and then expands to full-size. Crafted from durable plastic with a flexible rubber lid to prevent leaks. Safe for use in the freezer and microwave; cleans up in dishwasher. The lid and the bowl store together. Also available in 6-cup and 4-cup sizes.