People ask me all the time about screwcaps on wine. Now, most people don't think much about the science of wine; they just want to know one thing: can a bottle of wine with a screwcap be any good? Simple answer? Yep. Lots of really good wines today are closed with a screwcap, including so-called super premium wines, which can fetch $100 a bottle or more. But I’d like to qualify what I'm saying with a few points. First of all, the jury is out on whether or not screw caps will work effectively and enable some wines, particularly big, bold reds, to age in bottle for 10, 20, or even 30 years. We just don't know, because screw caps…

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