depends on the quality and way it is stored and vintage
the best thing to do is refer to a guide with grading of vintages for advice
No, refrigeration is not necessary.
Paul mason unopened 1852 rare cream
It was last for decades if unopened.
Unopened port should be stored upright rather than on its side. Unlike corked wines, port typically has a thicker cork and is less susceptible to spoilage from contact with the wine. Storing it upright helps prevent the cork from drying out and allows for better preservation of the wine.
Ruby Port is aged in wood barrels for two years before spending a lengthy time aging in bottles, where it doesn't have contact with any oxygen. This is called aging reductively. And it makes ruby Port very susceptible to oxygenation once opened, meaning it turns faster than a tawny Port which is only wood-aged and has some exposure to oxygen while aging as oxygen seeps into the wood barrels. As a result the ruby Port, once opened for drinking, only lasts about a week.
Chardonnay is good for about 7 years unopened.
If it's a vintage port, meaning it's from a specific year, then yes.
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It depends on what sort it is. There are quite a few variables, but it should be good for several years unopened and in a cool, dry storage area. Once you open it, it should last for several months.
Unopened milk can sit out for about two hours before it spoils.
It depends on what sort it is. There are quite a few variables, but it should be good for several years unopened and in a cool, dry storage area. Once you open it, it should last for several months.
3 years.