Britaï¿½ Hard Sided Bottle Replacement Filters. Fits hard sided bottles. 1 filter can replace 300 water bottles*. 2 filters
1. Rinse filter for 15 seconds (first time filter use only). 2. Drop in filter and press down firmly until filter is flush with straw. 3. Align lid and straw in unlocked position, and rotate straw to lock. 4. Fill bottle with water, screw on lid, then sip and enjoy! Replace filter every 2 months or 40 gallonsï¿½.
Always refer to the actual package for the most accurate information