Make sure to keep it somewhere where there is not direct sunlight. When it is closed it la
sts forever. If you open it , it depents how much oxygen remains in the bottle as to how fast it ll go bad. With half the bottle full it lasts about five years. The best , if you want to do it like you said, is to buy small sample bottles and once you open it put what is left in tge small bottles. This way it ll stay fresh until you drink again
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