Review on 💧 Enhance Hydration with Brita Water Bottle Filter Replacements - BPA Free - 2 Count by Nick Brunner

I went through the first round of filtering in my Brita bottle. They lasted about 2 months at about 1/2 gallon per day (8 fills). I believe it has a life expectancy based on average usage of 40 days, so I think it's held up quite well. Towards the end it becomes more and more difficult to suck water through them and eventually you really notice that the chlorine taste doesn't go away. Change it after 40 days and you'll be fine.