How to buy the perfume?

Oxygen is the "natural enemy of perfume", so the perfume that is too large and not easy to run is likely to deteriorate at any place under the ruthless attack of oxygen. In addition to its own unique aroma, the perfume that buys 30ml and 50ml capacity can maintain excellent freshness for about three months, so buying perfume is not the bigger the better, we still need to consider the frequency of its use.