I think it’s generally because glass bottles can let light hit the beer, and hops are photosensitive (light-struck beer will have a skunky aroma and taste). Brown bottles are the best at blocking light. Clear and green bottles are pretty bad. Cans obviously block all light.

I think most of the time, brown bottles are just fine, but the judges probably have a bit of bias here on their preferences.

I’ve been using a moonlander for a couple years now. I love it, but I’ve been toying with the idea of building my own with a trackball in the thumb cluster