This makes the wine too volatile and difficult to taste. The glass should at the minimum be a standard INAO-type tasting glass. However, there are glasses specifically designed for port on the market. It should be filled no more than halfway, so that the wine may show off its aroma and be fully appreciated. With the exception of Vintage, Traditional LBV and possibly Garrafeira, you may open the bottle and enjoy it immediately.
Vintage port requires decanting.
Pulling the cork is the most difficult part of this process. The older the bottle, the harder it is. The old corks inevitably break up in the neck and fall inside. If this should happen, simply strain the wine when decanting. Otherwise, a piece of muslin or nylon will do the trick.