This 16-piece set of food storage containers is perfect for storing leftovers, make-ahead meals and on-the-go lunches. Each container is 100 percent air and water tight. A locking lid for each base completes the set. Dishwasher, microwave and freezer safe. When using in microwave, open closure clips on each side and open corner of lid to vent. Not for use in ovens, under broilers or on stove-top. BPA Free.