I haven't tried Gatorade bottles because I don't drink Gatorade. Besides the awful (to me) taste, liquid Gatorade contains a lot of high-fructose corn syrup, which is bad for you. So do soft drinks.

I guess I'll stick with Platypus. Something in me rebels against acquiring bottles by buying a bottle of a soft drink and dumping the drink down the drain!
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey