> I think a comment of his was "kimchee flavored butter is not pleasant."

Hah, I saw video recipes of kimchi and gochujang-garlic flavored butter last year. Tho probably both were eye-catching online culinary fads rather than practical products.

Woman whose channel I follow uses both plastic and ceramic containers for kimchi - both include a small valve in the lid to allow exchange of air. And of course cabbage lands in that special fridge; she said she uses it also for storing vegetables and rice