it didn’t leak as advertised . It’s a GREAT product for wine lovers like me(great news is no need hesitate before opening a wine bottle anymore .
We drink a lots of sparking wine and nonalcoholic sparkling bottle drink, but usually has leftovers need to keep fresh in the fridge. We have few of those fancy cork/stopper, they works fine but usually not able to keep the drink fizzy. I got this pressure stopper set for this very reason. I had tried these with a bottle of champagne and a bottle of sparkling grape juice leftovers and these stoppers do help retain a lots of fizzy. This is a good buy for my usage.