Can you add flavored packets or loose tea to the bottle? April 22, 2019 19:25 Follow No, only water should be used in the bottle. Any additive to the bottle may actually clog the filter. Related articles Does this filter purify saltwater? Which of your products are TSA friendly? Where are your products made? Click here for the Performance Data Sheet What’s the difference between the annual plan and the pay as you go? Comments 0 comments Article is closed for comments.