Your beer isn’t just chilling in that brown bottle for fun—it’s science.

Light is the enemy of beer. When UV rays hit your brew, they trigger a chemical reaction with hops, creating that dreaded “skunky” flavor. Brown glass blocks most light, green glass is a bit less effective, and clear glass? Let’s just say it’s not doing your beer any favors.

Cans, though, are the ultimate protectors, shielding your beer from light completely. Plus, they’re lightweight and eco-friendly.

So, the next time you grab a beer, thank its packaging for keeping it tasting fresh and delicious.