Can I use this filter to drink out of a stream/lake/outdoors? April 22, 2019 19:17 No, this bottle was not designed for water that contains bacteria, virus, and/or cysts. Related articles Can I use hot water? Does this filter purify saltwater? Can you add flavored packets or loose tea to the bottle? Which of your products are TSA friendly? Click here for the Performance Data Sheet Comments 0 comments Article is closed for comments.