The wine-friendly machine-made Red wine glass of the glass Collection ouverture is ideal for everyday use. The shape of the glass helps to release the aromas of the red wines, emphasizes fruit and balance tannins. It is riedel's uncomplicated entry level series for customers who appreciate good reasonable Priced wine. All Riedel glasses are dishwasher safe.Should be machine washed at min. 170° F/75° C