1. Parts of a wine glass
Each wine glass is made up of 3 parts, namely, the body, the bung, and the foot. The type of wine determines what type of glass should be used. A red wine glass and a white wine glass will generally have a different body and stem. When you start serving wine, be sure to grab the glass by the stem to avoid fingerprints on the glass. When serving wine, you can decide whether to hold the glass by its body or by the glass's rim, depending on the temperature you need.
2. Red Wine Glasses
Red grapes are pressed with their skins during the red winemaking process. Some red grape varieties look red, but more will show a blue hue. Since most grape flesh is greenish, pressing with the skins adds polyphenols and tannins to the wine, giving the red wine the color and structure it deserves. If the red wine is exposed to air for a long time, it helps to eliminate the astringency of the tannins and gives the wine a soft, full-bodied flavor and aroma.
Red wine glasses expose the wine to more oxygen. They also have wider mouths and shorter, rounder cups, which give the wine wider access to air. Red wine glasses are usually longer to allow the taster to shake the wine before serving to oxidize it further. The shaking action releases the aromas from the wine, allowing the taster to smell more complex aromas.
The sweeter flavors and aromas of red wines are very pronounced in warmer environments, but when red wines are served at higher temperatures, the wine can be unpleasant. When moving a red wine out of a cooler cellar, you can start by waking it up for 20 minutes. You can also increase the temperature of the wine by holding the red wine glass by the stem. Red wines are best served between 10 and 15 degrees Celsius.
3. White Wine Glasses
White wines don't need to be oxidized as much as red wines, and because they don't have the tannins found in red wines, they can seem sweeter and lighter bodied. This flavor is best enjoyed at a cooler temperature, around 7 degrees Celsius is just right. Lower temperatures reduce the intensity of the wine's aromas and flavors, so white wine glasses will have smaller and narrower mouths to reduce the wine's exposure to air. Because of the need to keep white wines chilled, glasses need to be taller and thicker to make them easier for the taster to hold.
4, other aspects
Observation of the color and stability of red wines is one of the most important aspects of the wine tasting experience. Because the wine's "legs" - the oily droplets that show the sugar and alcohol content of the wine - can also reveal the quality and age of the wine from its color, red wine glasses seem to require more transparency than glass and crystal glasses. Therefore, red wine glasses seem to need more transparent glass and crystal glasses.