I am sorry to confirm the experience of "Klaus H". The closure does not seem for all wine bottles to be suitable. The look is appealing and the Prinzp the closure not bad from the idea. The only problem is the implementation. The closure not locked, but is not sufficiently pressed so as wine bottle, the hermetically closes. And that is why he is actually meant. If you compare the bottle together with the closure on the head and turns it over again, runs some wine from the closure out. Vice versa: ... air also enters at any time into the bottle. And with that the closure does not serve its purpose, unfortunately.