Wine lovers may want to stick to the "10-year rule" before deciding which bottle to open. Master of Wine Clive Coates says good vintage red wines mature in 10 years, and white wines are ready in five years. Coates also says wines will remain at their best for however long it took to mature, so a wine that ages in 30 years will also keep for another 30. But, if the acidity, tannin and alcohol are not in balance at bottling, the wine will not age well.

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