the Vacu Vin wine pump with the associated special stopper ensures that the wine can be stored longer in already opened wine bottles, you put the stopper in the bottle neck and use the wine pump to extract the remaining air, a clicking noise reveals that enough has been pumped and thus the optimal vacuum has been reached, the oxidation process is slowed down so that you can enjoy the wine again later, set with 1 x wine pump, 1 x pourer and 3 x closures