The brown bottles are those lighter brown ones and while it helps I had some skunky ones once. After pouring hold one of the bottles up and you'll see what I'm talking about. Almost a greenish brown. The four pack of PU cans is still the best option. Usually I just drink it once a year on tap at the local Slavic Festival. Makes it that much more special. Trader Joe's Czech Pils is what I drink when I can't find PU cans.