(with apologies to Tina Turner)
According to Wine Folly – a lot! There is finally a piece of research that shows that the shape of a glass matters. A Japanese medical group developed a special camera that photographs ethanol vapours as they leave the glass. It matters because this is how wine aromas enter your nose. And, lo and behold, the study proves that the wine glass shape is the best for delivering aromas in a consistent ring around the rim.
White wines are typically served in smaller bowled glasses. It preserves floral aromas and maintain a cooler temperature. Red wine, on the other hand, is served in larger glasses, as it delivers more aroma compounds and has a larger surface area to let ethanol evaporate. The wider opening also makes the wine taste smoother.