Rabbit Vacuum Wine Bottle Stoppers Set (Black) Wine bottle stoppers for Metrokane Rabbit and Houdini wine pumps Seals oxygen out of opened wine bottles when used with a wine pump Preserves freshness of wine for several days up to 2 weeks Patented release button breaks wine vacuum seal when ready to pour 4 wine stoppers included;seal four different bottles of wine with one convenient item Wine bottle stoppers for Metrokane Rabbit and Save-the-Wine vacuum pumps Seals oxygen out of opened wine bottles when used with pump Preserves freshness of wine for several days up to 2 weeks Patented release button breaks vacuum seal when ready to pour Package includes 4 stoppers