From:
http://blog.fooducate.com/2011/04/11/oh-my-mio-water-flavoring-has-nothing-real-in-it/
Here is the ingredient list:
Water, Citric Acid, Propylene Glycol, Malic Acid, Contains Less than 2% of Natural Flavor, Sucralose and Acesulfame Potassium (Sweeteners), Potassium Citrate, Red 40, Blue 1, Potassium Sorbate (Preservative).
What are you getting here? Propylene Glycol is a clear and slightly bitter liquid that is used to prevent discoloration of foods during storage. It has been shown to cause various diseases in animal studies when consumed in large quantities.
Acesulfame Potassium is a fake sweetener that is potentially carcinogenic.
“Natural Flavor” with fake colors to cause you to imagine the berries depicted on the package. Unfortunately those artificial colors may cause cancer and hyperactivity too.
Last but not least, potassium sorbate is a mold inhibitor – it allows this product to sit on a shelf for months.
You won't die, but I really can't imagine one good reason to consume this crap.