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? Can you add flavored packets or loose tea to the bottle? Does this filter purify saltwater? Click here for the Performance Data Sheet Which of your products are TSA friendly? Comments 0 comments Article is closed for comments.