... 100% food grade silicone , non-toxic,odorless2.flexible ,collapsible,easy to store,space safe3.all colours are available4.non-stick ,unbreakable ... ,microwave,oven ,freezer6.freezer proof to -40Centigrade,heat resistant to 230Centigrade Silicon kitchenware lunch box,silicon rubber food container kitchenware ,available in microwave