As much as we'd like to, we can't always manage to finish a bottle of wine after we've opened it. But instead of just popping the cork back in - and risk it going prematurely bad - the Gard'vin system shields what's left over from the air. All you need to do is pop one of the two included stoppers into the neck of the bottle, place the device on top, then pump it a few times to seal. You'll know you're done when the red tab pops up from the stopper. You've just bought your wine some valuable time in the sweet spot.