H2O SURVIVAL-H2OLIFEGUARD Water Filter Straw. 99.9999% Effective Filtration:Bacteria/Viruses/Heavy Metals/530 GAL. High Capacity Foreign/Domestic Use. Includes Neoprene Hydration Bag & Adaptor.

Bought four of these over several months. Bought the last one during the Holiday Season. Finally tried to use it and too much resistance thru the membrane to get any adequate water flow. Maybe the batch I got is defective. Who knows. IF this had worked as advertised, it would dominate this niche currently dominated by Life Straw because this device was independently tested by a Survival site and the water purposefully contaminated with bacteria, cysts and viruses, after filtration was free of All 3 pathogens. It would have been the only device of it’s kind-small, affordable and portable, that could deliver on filtering out Bacteria, Cysts and Viruses. Too bad and returning the one bought during the Holidays, stuck with the remaining 3 so NOT happy. Glad I was not in a critical hydration do or die situation with this as my only filtration option. YIKES!

I just purchased this product . I can say water does flow slowly through the filter. I am reluctant to drink the water because the only company mentioned as testing the product is an agency unknown to me that is in China. Also, I don't see where this product is offered or actually used by any other organizations or retailers. If it does all it claims to do why is it not sold more widely. If the manufacturer is confident in their product then get it tested by recognized organizations such as NSF international, consumer reports, or other well known testing organizations.

Looks well constructed, have not had the need of chance to use it yet as it an emergency item but looks good and might buy another.

Awesome addition to my CA earthquake kit! Lightweight and not space consuming.

I only got one use out of my filter. Very disappointing.

I'm very impressed with this product, I highly recommend it.

Best Water Filter Period

Works great. Going in emergency gobag