Be nice if the stopper could somehow be "refreshed". Some sort of chemical that would release the O2 by lets say putting the used stopper in the microwave for several seconds.
BTW, been using a Vacu Vin for years and have never had to toss a bottle.
Not sure what's in these, but they can theoretically use anything that reacts with oxygen. I have seen some oxygen scavenger packets based on iron, which essentially rusts as it reacts and consumes the oxygen. These packets are typically found in things like beef jerky etc.