Airtight 3-clip Container by Onyx
A stainless steel container with silicone seal and sturdy clips to make it airtight when closed. You can write on the container with a non-permanent marker. The bottom part of the container can be washed in the dishwasher, but the lid is not dishwasher or oven safe. Replacement seal rings can be special ordered over the phone.
These containers are great for packing your lunch or even just storing leftovers.