These eco-friendly airtight food storage stainless steel containers are better for you, better for the planet, and super durable! They are made from #316 (18/10) food grade Onyx Stainless Steel (the best!) and the lid has a silicone seal. The bottom part of the container can be washed in the dishwasher, but the lid is not dishwasher or oven safe. Made in Korea.