The glass is perfect for light-bodied red wines with high acidity and moderate tannin. This glass highlights the rich fruit-forward characters, tempers the high acidity of the wine, and captures all the nuances of the wine's aroma. Its unique flat-bottomed design brings forward primary fruit aromas, allowing the bouquet to develop in detail. It balances the intensity of flavor with the bitter tannins typical of thick-skinned red wine grapes.RIEDEL Winewings is a brutally functional glass collection, taking wine's aromas and flavors on a flight. Made up of several new shapes, these flat-bottomed glasses are reminiscent of the wing of an aircraft. This means the wine has a greater surface area in the glass, which increases the levels of evaporation and enables a greater intensity of aroma. This value pack contains 4 pieces for the price of 3. Machine-made and dishwasher safe.