The Alter Ego water filter from Aquaovo is a superb essential for the outdoors.  When first approached by Aquaovo to test their filters I was sent the datasheets that demonstrated the different filters' effectiveness.  Needless to say I was sold.  The effectiveness of the filters against bacteria and viruses is excellent, and quite possibly the best in the market (based upon what I can judge from published datasheets elsewhere).

The bottles are surprisingly robust, and I attach mine to an outer rucksack pocket and secure it with a karabiner,  Here I have easy access, and am happy to refill from shallow streams in agricultural land, from ponds, and from lowland rivers; all the places I would usually avoid.  

Historically I have used puri-tabs, or else a combination of hand-pump filters and UV lights (to eliminate viruses).  The Alter Ego filters are far more efficient and labour-saving.  There is no pump as the suction of drawing in the water through the mouthpiece pulls the water through the filter.





I give lectures and courses around the UK on subjects relevant to endurance athletes, coaches, personal trainers and therapists.  Details of these can be found here.



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