To use BottlePro in areas where water is unsuitable for drinking, we recommend the Ahlstrom™ filter, which removes 99.99% of pathogens. Due to the small size of the pores, the outer filter has a slightly lower flow, requiring more suction.
Directions: Before first use, wash the filter with high pressure water for 30-60s. To absorb the maximum amount of water, place the bottle vertically or up to 45º. Just fill the bottle with tap water and draw through the straw, and you will be drinking pure water, without substances and with a good taste. Put a new replacement every 2 months to continue with the same filtering quality.