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 Does this filter purify saltwater? Which of your products are TSA friendly? Can I use hot water? Click here for our Setup Guide Can you add flavored packets or loose tea to the bottle? Comments 0 comments Article is closed for comments.