Two generous rectangular containers give you five cups of storage each, enough for a full dinner, a large salad, or family size leftovers from a batch cooking session. The straight sided shape lines up neatly on a refrigerator shelf instead of leaving awkward gaps. When a container is empty, the food grade silicone body folds down flat and frees more than half the space it occupies in use, then expands to full depth in seconds. A snap lock lid with an airtight valve seal keeps soups, sauces, and dressings sealed for the refrigerator or a lunch bag. Rated from minus 20 to 120 degrees Celsius, the set moves from freezer to microwave to the top rack of the dishwasher, and BPA free silicone in a soft sage tone resists odor and stain buildup.