These round airtight food storage containers are available in multiple sizes, and will fit your every need. They are made from #316 (18/10) food grade stainless steel (FYI - the best you can get!) and the lid has a silicone seal, making the containers completely air tight. You can also write on the container with a non-permanent or China marker to help specify the contents, date and owner. The bottom part of the container is dishwasher safe, oven-safe, can go on the stove or even on the campfire. Both top and bottom are freezer-safe.