I'm considering gettting the SteriPEN Adventurer. I would like to use a 0.5 or 1 liter platy with a hydration tube. The SteriPen will not fit in the platy.

Any suggestions for a really lightweight bottle with a lid that the SteriPen will fit in? This bottle would be used to dip in streams, steri the water, then pour into the platy.

Wide mouth sugar water bottle, like Gatorade? Anything lighter? Maybe with a mouth the fits tightly against the SteriPen so I could just invert the bottle and SteriPen (so the bottle wouldn't have to be full to connect to the 2 leads).

Thanks
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Steve