Ok, maybe I didn't think things all the way through. I own a MSR Miniworks filter. I thought it would be really good for me since it would screw directly onto the wide mouth bottles I owned. Works good, but I decided, you know those bottles are kind of heavy, so i purchased a Platypus set of water bottles. So now I realize that unless I want to pour water from one bottle into another, I need an adaptor that will have the wide mouth male thread to a small mouth female thread. Does anyone know about such an adaptor? Klean Kanteen makes something close, but it fits their specific bottles. http://www.campmor.com/outdoor/gear/Product___78207
Thanks in advance
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