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? Where are your products made? Which of your products are TSA friendly? How do I know when the filter needs to be replaced? Comments 0 comments Article is closed for comments.