Mainstays Meal Prep Food Storage Containers are just what you've been looking for to make food preparation and portion control quick and convenient. 5 lids + 5 containers, total 10pieces. Container design are stackable save space in cabinets when they are not in use, they're reusable, and they're freezer, microwave, and top-rack dishwasher safe. Material made of BPA free plastic and good for modular use. CAUTION: Do not use in ovens, broilers, or on stovetops. Do not microwave empty (no dry heating). Remove lid before microwaving. Container may soften when heated. Use care to avoid hot splashes and burns.