If you drink wine on a regular basis but not often enough to finish a bottle every few days you are going to need to have a way to seal the bottle. In the past I would fight with the original cork to try to get it back into the neck of the bottle and most of the time that resulted in small pieces of the cork landing in the wine. The Concerto is a three piece set; the main plunger that removes the air from the bottle and two rubber corks. The corks have a one way valve flap; when the plunger is placed over it and pumped it pulls the air out of the bottle to preserve the integrity of the wine. It is easy to use and the rubber corks can last for years depending on how much you use them. The corks can be purchased independently from the VacuVin wine saver sets so there's no need to buy another plunger unless it's showing signs of wear. I can taste a huge difference in the wine when I used the wine saver pump and when I don't. VacuVin has several different wine saver products that are comparable to the Concerto so if this is a little more than what you want to spend on a wine pump there are other options. When I am looking for a unique gift for my wine drinking friends, I always poke around in their kitchen to see what type of wine pump they are using. If it looks like it is still in good shape I'll get them some replacement corks but if it looks like it's seen better days I will get them the Concerto so they can replace the pump and the corks at the same time.