Silicone Lids is Easy To Clean And Dishwasher Safe. Freezer, refrigerator & top rack dishwasher safe High quality silicone material, non-toxic, BPA free, Lead Free, Plastic Free. Dishwasher and Microwave safe Environmentally-Friendly, And A Money Saver, Eliminating The Need To Repeatedly Buy An Expensive Plastic Wrap. Stretch to fit round containers