how to preserve champagne –
Put a spoon in your champagne to keep it carbonated for 24+ hours after opening : r/lifehacks
Food Myths: Does placing in a spoon in a champagne bottle really keep it bubbly?, by A Renaissance Writer
Does a SPOON in a CHAMPAGNE bottle preserve the fizz? - Science Check
Does putting a spoon in your sparkling wine help the fizz last longer?
Does Champagne go off? – Glass Of Bubbly
How to Store Leftover Champagne
Does Putting a Spoon into Champagne Keep it Bubbly?
No, putting a spoon in an open bottle of champagne doesn't keep it bubbly – but there is a better way
Does a Spoon Keep Champagne Fizzy? Labmate Online
No, putting a spoon in an open bottle of champagne doesn't keep it bubbly – but there is a better way, Australian food and drink
Does a SPOON in a CHAMPAGNE bottle preserve the fizz? - Science Check
The 15 Best Champagnes to Drink
Champagne Myths, Separating Fact from Fiction – Glass Of Bubbly