Hi Mate
The water filter is an msr mini water works, I rate this very high .
http://cascadedesigns.com/en/msr/wa...nd-hydration/miniworks-ex-microfilter/product
I have had several filters over the years and I just keep coming back to this one.
They are easy to take apart and clean if it gets clogged up in the field and they filter out everything except viruses as with most filters .
Last year I done a 8 day hike in the North of poland I left my msr filter at home and brought a lifesaver bottle with me and my mate had his msr filter by the end of the first day both filters were getting clogged up as there was so much algae in the water .
My mate was able to strip his msr filter and clean it no problem but it was very difficult for me to strip the life saver bottle with out the risk of cross contamination also the flow rate on the msr was better . I had to wait till I got back home before I could sort out the lifesaver bottle in the proper way.
When I got back from this trip I switched straight back to using my msr filter and have not even thought about changing it since