The Winedoctor Essential Wine Preserver extracts the precise amount of air needed to keep your opened wine fresh for up to 2 weeks. This wine preserver is easy to use and comes with a built-in indicator that warns you when air has made its way into your bottle. You can continuously seal and re-seal bottles to maintain freshness. To use, simply insert an Intelli-Stopper into your open bottle of wine and use the pump to extract air. The pump comes off, and your wine stays fresh. With a compact, sleek design, you can take this kit with you to a restaurant or use it around the dining table.