They are made from #316 (18/10) food grade Stainless Steel, (The best of the best!) and the lid has a silicone seal. The containers are completely air tight.
You can also write on the container with a non-permanent marker. This helps to specify the contents, date and owner. The bottom part of the container can be washed in the dishwasher, but the lid is not dishwasher or oven safe. Made in Korea.
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Julie: a few months ago
Ample room and I love that there is a sealed lid. I would have liked some kind of divider system that is sealed itself, so I could devote one section to things like hummous, dip, etc. Really easy to wash and sterilize. Lid when locked down is tight and keeps everything where it's supposed to be.
Fiona: a few months ago
Actually smaller than I thought, fits inside the smaller Built NY Gourmet Getaway with room to spare. It takes on fingerprints right away, so you only get to admire its mirror finish on the day you receive it! I haven't dishwashed it yet but I don't see why you can't dishwash the lid, we have lots of water bottles with silicone seals that make it through just fine!