Any kind of drink you purchase that comes in a plastic bottle is automatically a no-go zone. Yes, even bottled water should be avoided. This is not because of the drink in question's content (though some are undoubtedly questionable), but because of the packaging. Commercial plastic bottles and containers are lined with a chemical called BPA, which has been proven to be extremely harmful to the human body.
BPA has been linked to a higher rate of reproductive cancers, as well as the growth of male breasts. Basically, this chemical messes with our hormones in a very dangerous way. If you buy anything in a plastic bottle, ensure it is labeled 'BPA-free' or simply buy drinks that come in glass bottles. Better yet, you could carry your own BPA-free bottle around with you in your bag.