Reduce your usage of disposable plastic food wrap. This set of 4 food grade stretch silicone covers create an airtight seal helping food to stay fresher for longer. A clever valve allows steam to escape in the microwave. Dishwasher safe, Freezer Safe, Microwave Safe. BPA-free. Set of 4 – 7, 11, 14 and 22 dia cm. Bowls not included.