Well, if you think about it, vacuum created with such a device can't be real vacuum due to the power of the device and the environment vacuum created in. It can

Well, if you think about it, vacuum created with such a device can't be real vacuum due to the power of the device and the environment vacuum created in. It can make the wine last a bit longer but not much. Fill the air gap with an inert gas heavier than air is a better option.