At 2.25 ounces, this bottle probably doesn't qualify as lightweight, but I'm not sure where else to post my question. Please remove if not appropriate.
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Does anyone use collapsible or foldable bottles? I've been using the Hydrapak Stash for the last month, at home, work, the gym and on the trail. So far I have been impressed.


Gear Review: Hydrapak Stash Collapsible Bottle

For those that do use this type of bottle, do you ever mix electrolyte replacement drinks in them?
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