A method and device for preserving wine or other oxygen sensitive items is disclosed. In some embodiments, the method involves injecting at least 0.15 gram of an inert gas to a closed container comprising wine and oxygen. In some embodiments, the device has a housing, a pressure indicator, a pressure sensor, and a one-way valve. The housing is configured to seal an opening of a wine bottle. The housing has a closure side configured to be in communication with an interior of the wine bottle. The housing has an input channel extending through the housing. The pressure sensor is within the housing and is in communication with the closure side. The one-way valve is in the input channel. The pressure sensor is configured to move the pressure indicator to an indicating position when a predetermined amount of pressure is reached at the sensor.