The OXO SoftWorks Vacuum Wine Preserver protects wine better than traditional corks or caps. The hand pump extracts air from inside the bottle, slowing down the oxidation process that can flatten a wines taste. The pumps contoured neck prevents pinching and the soft, comfortable grips are non-slip. With just a few easy pumps, the Stopper forms a vacuum seal that preserves flavors and aromas. Ready for another glass? Simply press the tab on the Stopper to release the vacuum seal. Includes two Stoppers.