Preserve every drop with the Fresh-Port™ Wine Topper. Like coffee, wine, olive oil, and other spirits are often oxygen sensitive, losing their freshness after breaking the seal allowing for oxidation. Comes In A Pack Of Two. Made of flexible silicone, the Wine Topper fits snugly around the mouth of the wine bottle creating an airtight seal. The magic is in the patented Fresh-Port™ and one-way umbrella valve which allows for the diplacement of oxygen. With the help of Airgone™, the Wine Topper displaces the oxygen resting on the surface of the wine, replacing it with argon, an inert, food-safe gas that prevents oxidation. Forget messing around with a ill-fitting cork, slip the wine topper on, apply a quick one second flush of Airgone™ through the Fresh-Port™ valve, and enjoy fresh wine again tomorrow or next week. ***Must be used with Airgone™ Argon Gas for best results. Airgone™ can not be shipped internationally. Visit our website for more information planetarydesign.com***