Vessel stopper with a vacuum pressure indicator

摘要

Disclosed are systems and methods for preserving wine in a vessel. The system comprises a stopper (10) adapted for engaging and airtight sealing the mouth of the vessel; the stopper comprises a valve assembly (16) operable to draw and maintain a pressure differential within the vessel and a pressure indicator (18) operable to indicate vacuum pressure within the vessel. The system further comprises a pump (120) operable to engage the valve assembly (16) and to draw gas from within the vessel to an external atmosphere.