this post was submitted on 31 Jan 2025
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Easiest access to the "inert gas" piece is dry ice from your local grocery store. CO~2~ is heavier than air. Wrap some in a tea towel and put it in the bottom of the bucket before adding the food. Then place the lid on but do not close. Keep in a place without significant air movement while the dry ice sublimates, pushing out the lighter gasses, before sealing the lid. This takes a few hours.
Times and amounts are purposely vague, as I don't remember them, but it should be easy to look up. If not, err on the side of too much and too long - the extra gas will just seep out the top.