Salt is corrosive, but iodized salt is generally eaten now, so it is best to avoid light, so it is best to keep it in brown glass bottles or pottery pots.

Vinegar soy sauce is made of porcelain and does not absorb flavor.

It is best to use glass sealed cans for sugar and pepper aniseed, which is not easy to get wet.

Stainless steel is recommended for oil, which is not easy to deteriorate.