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Already have a Sawyer Select S1 Water Bottle system and need to replace the foam-core bottle after you've reached 1,600 uses? Then this is the replacement bottle for you. Simply screw on the Micro Squeeze Filter from your original system and get filtering! It's also compatible with the Sawyer Squeeze Water Filter or Sawyer MINI Water Filter (not included).
High-tech Foam Core
Activated carbon and other proprietary ingredients are embedded inside the foam core, which has a usable surface area 50X's greater than a traditional carbon block filter. This results in higher removal rates of contaminants than offered by other portable filters or purifiers.