We tested out three possible methods.
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How to Keep Champagne Bubbly
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There’s nothing more frustrating than flat Champagne. But once the cork is out, what’s the best way to keep things effervescent? We put three methods to the test.

1. Put a silver spoon in the neck of the bottle.

Tradition has it that you can preserve Champagne this way. Our test showed that it doesn’t make a difference in the slightest.

2. Decant the champagne.

Though the screw-on cap definitely helps preserve the bubbles, pouring the Champagne from one bottle to another kills a lot of the effervescence right at the start.

3. Use a champagne stopper.

These closures clamp onto the top of a Champagne bottle to keep the fizz in. Short story: They work. Of the dozens of different brands for sale, we found the Rabbit Wine & Champagne Sealer to be particularly effective.