I have a 2L hydration bladder, can I use the steripen to sterilize it all?
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Probably not going to be a good idea. I know it does up to 1 liter (32oz or a Nalgene sized water bottle) effectively, but it would probably be risky with 2 liters. Not only is there a possibility the amount of time would be too little, but there is also the distance the UV light can travel through the water and still be effective. I have the SterPEN Adventure and just use a single nalgene and then pour it into my bladder. The extra weight sorta sucks, but at least I know I'm safe!
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