At a chain coffee bar in San Francisco, I saw a sign near the cream counter that read NAPKINS COME FROM TREES -- CONSERVE! In case you missed the first sign, there was a second one two feet away, reading YOU WASTE NAPKINS -- YOU WASTE TREES!!! The cups, of course, are also made of paper, yet there's no mention of the mighty redwood when you order your four-dollar coffee. The guilt applies only to those things that are being given away for free. Were they to charge you ten cents per napkin, they would undoubtedly make them much thinner so you'd need to waste even more in order to fight back the piping hot geyser forever spouting from the little hole conveniently located in the lid of your cup.