I was at the
I was at the Pilsner Urquell Brewery and asked about the green glass bottles. They told me it was due to USA demanding that imported beers come in green bottles to differentiate from the domestic beers (this happened back in the 80s I believe). Originally Pilsenr Urquell was in brown bottles (if you watch some old CZ films you can see this), but because they were already too deep in having green bottles in circulation it wouldn't be cost effective to switch back...As the bottles in CZ are on deposit and returnable. Living in CZ it isn't such an issue as it's consumed before skunking happens, but having Urquell in the States is usually a game of Czech Roulette. One tip I heard is to look for Urquell in a can, that will solve the skunking issue.