What should be done to eliminate light exposure to beer?

Using foil or dark containers is the best approach to eliminate light exposure to beer because light, especially ultraviolet (UV) light, can negatively affect the quality and flavor of beer. When beer is exposed to light, particularly in clear or light-colored bottles, it can undergo a chemical reaction that leads to the production of off-flavors, often described as "skunky." Dark bottles or opaque materials provide an effective barrier against light, preserving the beer’s intended taste and aroma.

In contrast, storing beer in clear bottles, keeping it in bright rooms, or displaying it on shelves where it is exposed to direct or bright light would inevitably lead to significant light exposure, increasing the risk of light-induced spoilage and undesirable flavor changes. Thus, using foil or dark containers is the recommended practice to keep beer in optimal condition.