The tin container for roasted green coffee has a hole to drain beans, a hole to see beans, a removable round lid, and embossed patterns all over the body, which are symbols of each region of European countries such as Germany, England, etc. Coffee is often preserved in items made of materials such as iron, wood, aluminum, stainless steel, or glass. However, there was a time when people preferred to use iron, wood, aluminum, inox, or glass because of their low cost, lightness, and easy transportation and process.
In Germany, people have orally transmitted how to preserve coffee for a long time is that putting a little unrefined salt at the bottom of the coffee container, and then lining it with a hygroscopic cloth so that little coffee fragrance will be released out and the coffee color is still bright and fragrant for longer.