I have had the Grayl Ultrapress for two years now. I haven’t thought I really needed to use it, because the places I have hiked & camped have had portable water spigots and fountains at their trailheads and sites. I used it intermittently anyway so that I could become familiar with it for the times when I would actually need it.

With all of the news stories lately about PFAS in drinking water, I decided to use it even at home, as news reports have mentioned that it’s in water supplies in many places – including my area in general (though my particular municipal water system claims it does not have PFAS). Grayl’s website states it will filter PFAS.
Pros:
- Filters AND purifies water (most other products only filter) including PFAS.
- Not an attention grabber – it looks like any regular water bottle.
- Simple to use (that isn’t necessarily the same as easy to use)
- Can pour filtered water into another container easily
Cons:
- Requires user to be able to stand on a solid surface and use their upper body weight to filter (difficult for wheelchair users and folks on small watercraft)
- If a larger amount of water is needed (for cooking, sharing with others, etc) you have to repeat the process multiple times, which expends more energy than other methods of filtering
- Expensive
- Filter cartridge unit cannot be back flushed/cleaned to extend its life
- Does not fit in my car’s cup holders
It did not take me long to get tired of the small amounts of water (16.9 oz) I can get from the bottle, and I ended up getting a 2 gallon carbon filter for home use, which has worked well.
It was a valuable experiment, since it made me realize that although my tap water seems fine to me taste wise, it has actually made a positive difference in how my tea tastes.
I do sometimes take it with me when I leave the house so that I can filter on the go without attracting a lot of attention, though I tend to prefer to bring 2 large Nalgene bottles with me that hold what I need until I return home, especially when I go hiking. For larger amounts of water filtering, I have a Sawyer Squeeze Mini in my gear, which I can backflush to clean.
I have tossed the Grayl into my car emergency bag, so it is there if I need it, but it’s not going to be in rotation to be regularly used.










