If stored in a cool dark room, why would red wine need to be in a dark green bottle?
Answer From Expert Roger Bohmrich MW
Green glass of different tints is common around the world for all sorts of liquids in particular as well as other perishables; there are many examples including beer, olive oil and wine. You are right to suggest that, if a wine is never exposed to light (natural or artificial), it may not need to be in a dark bottle. Most wines, however, are exposed to light at some point - in a store, restaurant cooler or on a wine rack at home. You can, of course, find any number of wines in clear bottles. Many will be consumed young such as roses or basic dry whites while others are intended for long cellaring, such as Sauternes. So the reason the maker may choose a particular type of glass and bottle depends on a variable mix of factors: cost, tradition, market positioning, and protection from light.
