The wine stopper we used for our wine bottle popped off in the fridge and the wine must have been uncovered overnight. What is the Halacha?
It may be used, even for Kiddush (assuming there is no issue with non mevushal handles by non Jews). See also: https://asktherav.com/a-drink-left-uncovered-overnight/ Sources: ראה שו״ע אדה״ז ערב, א.…



