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Title: A gimmick
Review: The whole point of having a decanter is to aerate the wine, not to preserve it in a vacuum. Since not all wines need decanting, but all of them could use a vacuum stopper to preserve any unfinished wine, it makes much more sense to just get a regular decanter and some vacuum stoppers (Metrokane or Houdini stoppers are fine) instead of this vacuum decanter.
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