Grayl UltraPress Purifier Bottle 500ml

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It's damn stiff to press right from the start. Even though he has pressed all the way down, there is still a little water between the inner and outer bottle.

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Simple to use

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Does what it promises, at least with a fresh filter. Easy to use and the commissioning time is significantly less than with a pump-operated hose device. It doesn't weigh that much, but it's a bigger box to pack than the smaller pumps I own. Personally, when I always take the smallest possible backpack/chest on a trip, the packability affects it, in this case by that one star

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The most practical water filter I've tried. Removes all the aftertaste from even dark water better than anything else I've tested. The only cons are the weight and the price, but in my opinion, the filtering ability takes precedence over these.

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Based on one experience, it seems like a very efficient and smart product.

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High quality, light to carry. There is no need to carry so much water with you when you have this bottle with you.

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A good evolution from the previous smaller bottle. Easier to press and both drinking and carrying are easier. At least it works well for urban travel, we haven't had time to go on group trips yet.

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At least on the first trip, the bottle was fine and filtering was easy compared to prior expectations/a few comments. Of course, the water taken from the lakes basically looked clean, but there was e.g. pollen on the surface of the water. The color also brightened a bit thanks to the filtering. It is a little difficult to slip the bottle into the side pocket of the chest, because the outer surface of the bottle is made of silicone or other sticky material. So at least I have to carry another water bottle with me on my trips, so that I can easily drink while walking. The bottle is also a bit heavy and I would hope that the cap was not loose but attached to the bottle with a loop etc.

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It has worked well, relatively easy to use.

The ultimate filtering AND purifying travel companion. Takes a bit of time and effort to use, but nothing beats it on the go. Stretch a nylon stocking or similar over it's mouth when filling to prefilter water and extend the life of your filter!