Many adults couldn't start their day without the lift they get from the caffeine in their morning coffee. Kids know about caffeine's powerful psychoactive effects too, and many of them look for that same caffeine rush in colas, the only soft drink permitted to contain the drug. Now Pepsi is spearheading a lobbying force that wants to allow caffeine in other pops and even bottled water. Despite worrying evidence from recent studies, Health Canada seems poised to approve Pepsi's application.