Beer Bottles and Growlers

Beer Bottles and Growlers


What is the difference between beer bottles and growlers? Most beer bottles are made from dark coloured glass or PET and they are used for storing beer, while the majority of growlers for homebrew use are made from stainless steel, and are used for transporting, sharing or serving your homebrew. Below we will explain the reasoning for using coloured beer bottles.

Why are dark coloured bottle great for preserving beer? Studies have shown that when the beer is exposed to sunlight, it [light] breaks the alpha acids found in hops that, in turn, react to the sulfur found in beer, thus resulting in a skunky smell. This particular smell resembles the stench of being sprayed by a skunk.

Coloured beer bottles filter out the UV and visible lights that cause the chemical reaction. Even if you say that you handle your beer properly and store it in a dark place, you cannot really tell how much exposure the bottle will get in its lifespan. Green bottles may also be used, but they are not as effective in filtering light compared with the brown bottles.

While coloured bottles are very beneficial in keeping the beer fresh and good-tasting, there are some disadvantages that you need to be aware of. One of the obstacles of using dark-coloured bottles is that it can be difficult to inspect the beer for any defects or even foreign matter floating in it.

**It should also be noted that light does have an effect throughout the brewing process. Once you have started your fermenting you should expose your brew to as little light as possible, that is until such time as it it being poured from a bottle or dispensed from a keg.

Homebrewing Odds & Ends