I’ll just bring a 6-pack of beer & a flask of Scotch.
The manufacturers website doesn’t explain the technology used in the straw or gives the microns filtered but here is a link to the test results.
The mothership states 0.2 micron filtration so the sawyer mini that shows up here occassionally is still the best survival straw buy (0.1 microns and 100,000 gallons of water filtered).
Here is the amazon link http://www.amazon.com/Alexapure-Survival-Spring-Compact-Filter/dp/B0140UUXNE
The Sawyer filters don’t filter out any chemicals or the bad taste. This one does because it uses carbon as one of the two stages. I’m going to get a few and use this one after the Sawyer I’ll bet u I will get more then 300 gallons then.