““Key to Ratings: Probably OK = (X) Not ideal = (XX) Pretty bad = (XXX) Definitely dangerous = (XXXX) ~ ~ ~ How bad is it to drink water out of a bottle that you left in the car for weeks? (X) First, know that despite scary e-mail forwards from nervous relatives, you needn’t worry about disposable plastic water bottles leaching cancer-causing chemicals into the liquid, according to the American Cancer Society. Commercial water bottles often don’t contain concerning hormone-disrupting chemicals like bisphenol A ( BPA) or phthalates either. But any used bottle can harbor germs from saliva backwash, says Charles Gerba, a microbiologist at the University of Arizona and coauthor of The Germ Freak’s Guide to Outwitting Colds and Flu. Surprisingly, “that’s not really a problem as long as you don’t share the bottle with other people,” he says, since your immune system has already dealt with whatever cold, flu, or other germs may be in your mouth. One exception: sports bottles that you’ve used your thumb or fingers to press shut. Bacteria such as E. coli or Staphylococcus on your hands can contaminate the nozzle when you press it down and then flourish in the””
