An aerator’s purpose is to expand the surface area of wine, which allows the air to mingle with it. Aerators force air to be circulated throughout it, the end result is a wine with an expanded aromatic profile and/or softer tannins.
A handy aerator will easily do the trick in minutes. A Vinturi Wine Aerator  for example, is held above your glass while you pour wine through the top of the aerator. As the wine flows through the aerator, it “breathes” as bubbles are sent through it. An aerator is appropriate for casual meals, where time is of the essence.
Available at Vinturi.com  for $39.95
Another more moderately priced option and the one I own is the Soiree .
Soirée has been rated the "Best Bet" of all wine aerators and is proud to be the only wine aerator featured by ZAGAT BUZZ®. Soirée is the only hand-made wine aerator that trumps natural and gentle wine aeration & is also the most affordable.
Available at http://shop.winesoiree.com/main.sc  $25.00