Archive · 9 Aug 2026
Why beer almost always comes in brown or green bottles
Beer bottles are usually brown or green, and there is a good reason for that.
Beer can get hurt by light, just like skin can get a sunburn.
When sunlight hits beer, it can make the beer taste and smell bad, like a skunky smell.
Brown bottles are like sunglasses for beer, keeping out most of the sunlight.
That is why most beer comes in brown bottles.
Green bottles do not protect as well, but many brands use them anyway because of tradition.
Long ago, during World War II, Europe ran out of brown glass, so breweries used green bottles instead.
People got used to green bottles, and some thought green meant fancy imported beer.
Clear bottles protect the least, so brewers use special hops that are less sensitive to light.
Cans and kegs protect beer the best because no light can get in at all.
Most beer bottles are brown or green, a choice driven by science, history and marketing rather than coincidence.
Ultraviolet light triggers a chemical reaction that breaks down hop compounds, producing a 'skunky' smell known as lightstruck beer.
Brown glass blocks most UV light and is the industry standard for preserving beer's taste and freshness.
Green bottles became common in Europe during World War II due to shortages of brown glass, and later became linked with premium or imported beer in markets like the United States and Asia.
Clear bottles offer the least light protection and often rely on modified hop extracts that can slightly change flavor, while cans and kegs protect beer best by blocking all light.
- Who
- Breweries and beer brands, along with the consumers who buy their beer.
- What
- The reason beer is mostly sold in brown or green bottles: brown glass blocks UV light that causes 'skunky' off-flavors, while green and clear bottles are kept for tradition and marketing.
- When
- A long-standing practice whose green-bottle tradition dates back to glass shortages during the Second World War.
- Where
- Liquor stores around the world; the green-bottle trend originated in Europe and is especially associated with imported beer in the United States and Asia.
- Why
- To protect beer from ultraviolet light, which triggers a chemical reaction in hop compounds that creates an unpleasant 'skunky' smell, and to maintain brand identity.
- Most common bottle colors
- Brown and green
- Why brown is standard
- Blocks most ultraviolet light, preserving taste and freshness
- Cause of 'skunky' smell
- UV light breaks down hop compounds in a reaction called lightstruck
- Origin of green bottles
- European brown-glass shortages during World War II
- Green bottle reputation
- Associated with premium or imported beer in the United States and Asia
- Clear bottle trade-off
- Needs modified, light-insensitive hop extracts that can slightly alter flavor
- Best protective packaging
- Cans and kegs, which completely block light and limit oxygen exposure