Air Cork uses a custom made, medical grade latex balloon.
This balloon is lowered in to the unfinished bottle of wine and inflated using a custom produced pump in the form of a cluster of grapes.
The balloon floats on top of the wine, and once the balloon touches the side of the bottle, the wine is completely sealed from the outside air, preventing further oxidation.
You can see that the Air Cork is working and the bottle is completely sealed. Go ahead - you can even turn the bottle upside down.