However, the standard serving dimensions are generally smaller -- usually 2 to a few ounces -- so figure about 100 to 150 calories for each glass. If you notice, wine bottles are made from dark, tainted glass, and this is safeguard the wine from Uv rays coming by the sun or other light sources. https://squareblogs.net/stepuncle2/top-5-benefits-of-wine-of-your-month-clubs