GRAYL 16-Ounce Ultralight Water Purifier & Filter Bottle

Last updated date: October 11, 2021

DWYM Score

9.2

GRAYL 16-Ounce Ultralight Water Purifier & Filter Bottle

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We looked at the top Water Filter Bottles and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Water Filter Bottle you should buy.

Update as May 4, 2021:
Checkout The Best Water Filter Bottle for a detailed review of all the top water filter bottles.

Overall Take

This 16-ounce purifier bottle is made to remove waterborne pathogens from most any freshwater source. Global travelers bring it along to ensure bacteria, protozoan cysts and other toxins are not lingering in their beverages.


In our analysis of 6 expert reviews, the GRAYL 16-Ounce Ultralight Water Purifier & Filter Bottle placed 4th when we looked at the top 5 products in the category. For the full ranking, see below.

From The Manufacturer

COMPACT: 16 oz. purifier bottle makes safe, clean drinking water from virtually any freshwater source. FAST AND EASY-TO-USE - Ideal for international travelers, hikers, and emergency prep kits. REMOVES WATERBORNE PATHOGENS (e.g. Hepatitis A, Norovirus, Rotavirus); Bacteria (e.g. E. coli, Salmonella, Cholera); and Protozoan Cysts (e.g. Giardia, Cryptosporidium). AWARD WINNING [OnePress] design — Just Fill from any sketchy freshwater source, then Press on a low surface (e.g. ground), then Drink safe water, anywhere. FILTERS particulates (e.g. sediment, silt), many chemicals (e.g. chlorine, benzene) and heavy metals (e.g. lead, arsenic); zero aftertaste, eliminates bad odors, improves clarity and flavor.

Expert Reviews

Expert Summarized Score

10.0
1 expert reviews

User Summarized Score

9.2
2,620 user reviews

What experts liked

Easy to use, fill, press, drink. Removes harmfil bacteria, protozoa and viruses from water soureces. Nifty design for a cup like drinking experience unlike competing brands
- BestReviews

What experts didn't like

Pushing down the filter takes strength. Is not as light weight as claimed. Expensive
- BestReviews

An Overview On Water Filter Bottles

Water filters have been around for decades, with versions you attach on faucet ends and in water pitchers. Now, today’s water filter bottles are hi-tech, portable and convenient. Some remove almost 100% of the chemicals and other unwanted particles that occur naturally in water, and they are safe enough to use with untested sources like freshwater lakes.

These bottles are made from glass, stainless steel, aluminum or plastic (look for BPA-free plastic), and they can have either small or wide-mouth spouts or straws. They are not always inexpensive, but purchasing one bottle of this kind, rather than buying single-use, plastic water bottles, can save both money and the planet.

The filters in these containers tend to last a long time, but before you buy the bottle, find out how new ones can be purchased (and what their price is).

You may want a smaller, 16-ounce bottle, or a larger one for long treks. Some hold 48 ounces or more, but these will be quite heavy. Sizable drinking containers are great for long car trips and camping. They are also handy to keep by your desk while you are working.

The Water Filter Bottle Buying Guide

  • Not all water filter bottles are dishwasher-safe. If they are, they will have specific washing instructions. If you do not follow them, your bottle may get damaged or ruined.
  • Some filters last longer than others, so read the product descriptions carefully and change filters according to the recommendations.
  • These bottles make especially great gifts for friends and family members who travel, cycle or hike.