[Quick Filtration]Our water bottle filter adopts high-quality coconut shell carbon block filter, which is used to replace the water bottle filter element and effectively removes odor, sand, rust, chlorine deposits, etc., providing excellent drinking water at any time. [Filter Compatible Models]The filter does not fit water bottles without straws or soft squeeze sports bottles, compatible with 26 or 36 oz Brita plastic filtered water bottles and 20 or 32 oz stainless steel water bottles. [Improved Taste]This water bottle filter uses high-quality filter material and upgraded innovative structure, with a sealed bottom for greater density. This replacement water bottle with filter element has a larger filtration area and better filtration effect to ensure better water taste. [Easy to Use]This water filter is easy to install. The first step is to clean it with clean water for 15 seconds. Step 2: Insert the filter into the straw; Step 3: Attach the straw to the lid.