This corkscrew uses only the force of the air when opening the bottle. The big advantage is that no crumbs or debris get into the wine from the cork. It’s a multi-year story, and perhaps just a rumor, that with this mode of opening, the wine doesn’t meet the fresh air suddenly, but gently, slowly. That is, when opened, the wine does not receive a shock. How much of this is true? Please decide when to use.