The filter comes with the bottle, is easily fitted and last for approximately 2 months. I have struggled to find the replacement filters on the High Street, but they seem in plentiful supply on Amazon at present.
By STEVEN THOMPSON on 22 March 2014
Hi I didnt count either i just judge it. I usually change my filter every two months or so, and get a new bottle after every two filters. Its a great bottle, perfect size and i have had no leaks in my bag. Tbh argos have a better deal for 15 you get a bobble and three filters ( if its still going!)
By Bags and Books Addicted! on 13 April 2014
I use a bottle brush to clean the actual bottle, top of the filter and the actual filter each time I refill the bottle. If that doesn't work, you may need to replace your filter.
By PottyDotty on 20 May 2015