GRAYL Ultralight Water Purifier [+ Filter] Bottle – Review

GRAYL Ultralight Water Purifier is an interesting combination of functions in one product. It’s actually a bottle that filters water, which makes it a perfect companion for your daily hikes climbs, traveling and more! 

GRAYL Ultralight Water Purifier [+ Filter] Bottle

If you’re looking to filter water, but you don’t want to buy big products that need to be installed into your house, maybe buying something small and portable will be a good entry to the world of filtering. After that, you can figure if you need filtering and all and possibly think about your next step as well.

Let’s talk about the GRAYL Ultralight Water Purifier bottle and discuss the features that you’re paying for. After that, we will present you with the pros and the cons that we ran into after our research. It’s important to weigh out the good and the bad to know if this product is suitable for you.

GRAYL Ultralight Water Purifier Features

PracticalIdeal for global traveling, outdoor adventures, emergency preparedness, hiking, backpacking, camping, fishing, survival.
Fast and easy-to-useSimply Fill. Press. Drink. No sucking, squeezing, pumping, prolonged waiting, ultraviolet bulbs, or batteries.

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Gets rid of literally everything

Usually what we’re looking for is a filter that gets rid both of organic and inorganic problems in your water. This one exceeds our expectations because it gets rid of chemicals, sediments, organic toxins, and even viruses! Most bottles don’t have the power to get rid of living pathogens! 

Lightweight and portable

You’ll have no concerns carrying this thing around, as you’re not even going to feel it. It’s 11 ounces or 300 grams, which is pretty lightweight for a filtering bottle, but not so lightweight for a bottle that claims to be „Ultralight“. 

Activated carbon + ion exchange

The best combination there is out there! These filtering systems will get rid of odor, taste, excessive minerals and more! The carbon has the power to hold pathogens as well, while the ion technology uses the proteins in bacteria and protozoa against their own well being and it sucks them up! No pesticides and certainly no concerns about any heavy metals.

The taste is phenomenal.

As soon as you don’t have extremely musty water, the taste test will surprise you on this filter. The activated carbon has the chemical ability to make any water much tastier and „luxurious“.

Made of durable materials

Now, this bottle is made of polypropylene and similar stuff, which is not the ideal thing you want from a bottle you’re keeping your stuff in. It will surely survive a drop to the floor, but it is not the most odor-friendly material. This shouldn’t concern you if you don’t have the bottle for a long time, though. The bottle itself is also antimicrobial, which makes it a perfect companion in humid climates.

Long-lasting filter

This filter lasts anywhere up to 40 gallons, which is 150 liters. We can’t tell you how long that’s going to last you because we are not familiar with your habits, but if you drink at least 2L per day, the filter won’t last you more than two and a half months. 

The set-up

This bottle is just two cylinders combined: the tank and the filter. If you’re having trouble moving any of the two, make sure to twist it as well, and you’ll get a much better result. The two have to be tight because otherwise, the filter would be falling out.

The filtering

This bottle has a specific way of filtering and it relies on the strength of the user. You’re supposed to push the top of the bottle to „help” the filtering process, but in the end, it is often very hard to do. When the water is very contaminated, you will have to use brute force to filter with this bottle.


It comes in four different colors: black, blue, green and orange. This gives you the power to personalize your environment-friendly living.

NSF/ANSI certified

As all bottles created in the United States of America, this one qualified to be tested by the famous organization from Michigan. It did very well on the testing and earned the safety standards.

Regular bottle volume

We’re looking at 500 mL of volume in the single filling, which is pretty standard and is a great amount of liquid for daily use. If it was more, the bottle would gain on weight pretty significantly.


  • effective filtering techniques combined
  • high efficiency both with organic and inorganic compounds
  • great price vs. quality ratio
  • the activated carbon gets rid of possible taste and smell


  • hard to use sometimes
  • a bit heavier than the competitors in the range
  • flow can be pretty slow if you are filtering very dirty water
  • using it with dirty water will reduce the bottle’s „lifetime“


The GRAYL Ultralight water bottle has some very impressive features, such as the efficiency of filtering itself and the long list of things that it gets rid of. On the other hand, it has many small cons that could bother specific people, and while they don’t make the bottle unusable, they should be considered while buying. 

It’s a great choice to get a filtering water bottle because these can be very easy to use and carry with you. If you’re just entering the world of filtering, this is a great start for sure. People in sports and those who enjoy daily activities in nature find this gadget to be extra useful.

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