The Sawyer Micro Squeeze Water Purifier filters out 99.99% of viruses and reduces heavy metals such as lead, copper, arsenic, and mercury down to 0.5 parts per billion (up to 260 times lower than the EPA’s maximum). Completely drying out the the Select Bottle is not necessary. The adsorption filtration technology within the foam is designed to both filter water as well as prevent growth. If you do dry it out and mold grows on the unprotected walls of the bottle, fill the bottle with water and continuously squeeze and release for approximately 3 minutes or until the mold is gone.
