No, putting a spoon in an open bottle of champagne doesn’t keep it bubbly – but there is a better way | Geoff Scollary for The Conversation

The teaspoon myth persists, despite clear evidence to the contrary - but you can still preserve sparkling wine after it's open

At a recent tasting, I was presenting some sparkling wines from the Limoux region of France, a region that produced sparkling wines at least 100 years before wines from the Champagne region were well known.

Towards the end, I commented that if the bottle is not empty, seal it with a sparkling wine stopper and store it in the refrigerator. The response was: Why bother to seal it? Just put a spoon in the neck."