I don't think caffeine in moderation is bad with pregnancy. Having said that, I gave up completely when pg with DD and am making an effort not to have too much this time - 1 to 3 cokes or coffees a week (or less if I can manage it). My reasoning? Even though small amounts of caffeine are not a problem in pregnancy, I want to breastfeed, and I DEFINITELY don't want the baby getting tanked up on caffeine and refusing to sleep. In my opinion, its beter to break the caffeine addiction while pg than when with a newborn and so tired you can't think straight!!!! I would stay away from energy drinks like red bull etc with large amounts of caffeine and guarana, but I don't think a small amount now and then is going to hurt anybody.