Proper storage serves to protect the quality achieved through the effort so far. Coffee is porous and therefore easily contaminated with strong odours such as those from gasoline, agrochemicals, fertilisers, or smoke. Therefore, it is favourable to store coffee in hermetically sealed bags (e.g. Grainpro or Ecotact), and to store coffee by itself (i.e. without any potential contaminants in the room). Fluctuations of temperature or humidity in the storage environment can lead to damage, as can direct sunlight.