this post was submitted on 23 Sep 2023
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Yes, glass and stainless steel containers with air-tight lids exist. Some use a silicone or natural rubber gasket for the seal.
If you can't find those, canning jars (Ball, Mason, etc.) have been around for ages, and you can always wash and reuse empty jars that once held food from the market. You can avoid food contact with the lid coating by keeping the jar upright.
When I need a microwave-safe lid, I find that a damp paper towel or upside down plate works well.