If you can use it multiple times for the same bottle of wine then why can't you reuse it for another bottle? Do they magically stop working?

Thanks for the question! Each Repour stopper is designed around a single 750 ml bottle of wine, consumed glass by glass. In this way, Repour can absorb the Oxygen out of 1500 ml of air. The math behind this 1500 ml calculation goes like this: 1 glass gone = 150 ml 2 glass gone = 300 ml 3 glass gone = 450 ml 4 glass gone = 600 ml 5th glass = bottle's empty --------------------------------------- 1500 ml of air We fully endorse finding creative ways to stretch a single stopper from one bottle to the next (and are happy to share the "hacks" that people have shared with us), but also want to make sure that every user has a perfect experience with Repour. In this way, we only formally endorse use over one bottle of wine as we know if you use a Repour stopper in this way you'll have exceptional results!

Can you clarify how long Repour lasts? Is it single use (meaning one on, when off throw away), one bottle or something different?

Repour lasts for days, weeks or even months. We've had bottles of wine saved with Repour stay perfect for months. Each Repour stopper is good for one bottle of wine, even when consumed glass-by-glass. When storing a saved bottle with Repour, to enjoy another glass, simply remove the Repour stopper, pour another glass and then restop the bottle with the same Repour stopper. Repeat as needed until the bottle is empty, One stopper-One bottle.

Is it necessary to keep the wine in the fridge?

Not necessary with red wine, as long as you'll be drinking it within a few days. With white wine, you'll want to, because you'll want to drink the wine chilled anyway. But red or white, the wine will last longer if refrigerated. Just remember to take red out of the fridge an hour before serving to bring it to room temp.