Lid, main body, and strainer of this steamer/sealed storage container are all made out of highly heat resistant polypropylene. Two-way containers can be used with the strainer attached or removed. With the strainer attached, vegetables can be steamed using their own moisture. Fill the container with water below the strainer to steam meat buns, re-steam leftovers, etc. Remove the strainer to heat up food or use as a food storage container. Various cooking methods and times are printed on the lid, and more detailed instructions can be accessed from the QR code on the package. Check out the recipe collection on the Lustroware Home Page to learn even more possibilities. Part of one of our most cost-effective series. With the strainer removed, this container has a full volume of 1.17 liters.