Beer is a refreshing adult beverage that is sold in either cans or bottles. There are still a great many people who prefer bottles when purchasing this product. So, why are some of the bottles clear and others come in green or brown? Sunlight is the simple answer to this question. The UV rays from the sun break down the acids contained in the hops. These acids then react with other components and the beer smells like the spray of a skunk. To avoid this, beer should not be exposed to sunlight. Clear bottled beer is generally considered to be less expensive and has fewer hops to react to the sunlight.