Tulip,
I was using Nuun tabs in my water bottles and a good friend pointed out that an ingredient in the tabs, polyethylene glycol, is a product found in antifreeze. That sealed the deal for me ... no more Nuun tabs. I'm now using juice cut with water and adding a touch of sea salt. Maybe you're okay with Nuun, but thought I'd mention this.
http://en.wikipedia.org/wiki/Polyethylene_glycol




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