Bohemia Crystal decanter and two wine glasses set. There are two reasons for decanting wine: for vintage and reserve wines, to separate the wine from the sediment; and for young wines, to accelerate breathing and increase their complexity so as to note their aromas and flavors. Decant vintage and reserve wines by letting the wine slide down the decanter so the sediment remains in the bottle. For young wines, pour the bottle directly into the decanter so it can breathe. Bohemia Crystal glass is recognizable for its extreme transparency, shine and durability.