Keep you and your family safe from plastics leaching chemicals in your food with the new GlassLock tempered glass storage containers. Glass lock is unique and innovative. The tempered glass is stain resistant, durable and safe. Its locking lid has a silicone seal that is air and water tight keeping your food fresh. GlassLock is microwave safe, non-toxic and non reactive, ensuring nothing transfers into your food while reheating. You can take it from the freezer to the microwave with no concerns. GlassLock is top rack dishwasher safe.