The Wine Saver is a vacuum pump that extracts the air from an opened wine bottle and re-seals it using a rubber stopper. The airtight vacuum inhibits the oxidation process that is responsible for the deterioration of wine. The vacuum is created by placing a stopper into the neck of the opened bottle and pumping it until resistance is detectable. The pump incorporates a patented ‘click’ mechanism that indicates when a sufficient airtight environment has been established. Currently averages 4.5 out of 5 stars from over 1,900 people (read reviews). It’s discounted 42% on Amazon, so you can get it right now for just $9.