How long they can successfully improve actually depends on the bottle, cork, and storage conditions as mentioned above.
Cork
Use a high-quality cork. Natural corks are more expensive than agglomerated, but last much longer. Synthetic corks are an excellent alternative and will help to preserve your wine
Storage
The ideal temperature is between 7° C and 13° C (45° F – 55° F). You can store your wine as warm as 20° C (68° F) but keep in mind it will age faster as the temperature rises.
The temperature must be constant with little to no fluctuation. Keep your wine in darkness. Sunlight and ultraviolet light will damage the wine
over time.
The humidity should be 65% to 75%.
Would synthetic corks be better?
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