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Dear Dr. Vinny,

How long will it take for sparkling wine to go flat after it’s poured into a coupe-style glass? I’m asking because I’m having a Champagne toast at my wedding and want to make sure it won’t go flat between the time it is poured and the time the toasts will happen. It will probably be a 30- to 45-minute time gap. The weather will be dry and warm.

—Sam F., Santa Ana, Calif.

Dear Sam,

Congratulations on your upcoming wedding!

Good question. There are a lot of variables at play. To start with, some sparkling wines are simply more effervescent than others. Temperature is probably the next biggest variable at play. Bubble-creating carbon dioxide is more soluble in cold temperatures, so the best thing you can do is chill the bottles all the way down to 40° F or so.

You mention that the weather will be warm, and that you’ll be pouring the bubbly into coupes, which provide a lot of surface area for the carbon dioxide to escape. Both of these are working against you, but even so, I think you’ll be OK. It takes many hours, not minutes, for sparkling wine to go completely flat. Nevertheless, you should aim to pour your sparkling wine as close to your toast as possible.

—Dr. Vinny

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